Internal use only
White paper
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March 2015
Xperia Z4 Tablet
TM
SGP771
White paper | Xperia™ Z4 Tablet
Purpose of this document
Sony product White papers are intended to give an overview of a product and provide details in relevant
areas of technology.
NOTE: The illustration that appears on the title page is for reference only. All screen images and elements
are subject to change without prior notice.
Document history
Version
March 2015
First released version
Version 1
Sony Mobile Developer World
For the latest technical documentation and development tools, go to www.sonymobile.com/developer.
This document is published by Sony Mobile
Communications Inc., without any warranty*.
Improvements and changes to this text
necessitated by typographical errors,
inaccuracies of current information or
improvements to programs and/or equipment
may be made by Sony Mobile Communications
Inc. at any time and without notice. Such
changes will, however, be incorporated into new
editions of this document. Printed versions are to
be regarded as temporary reference copies only.
This White paper is published by:
Sony Mobile Communications Inc.,
1-8-15 Konan, Minato-ku, Tokyo108-0075, Japan
www.sonymobile.com
© Sony Mobile Communications Inc., 2009-2015.
All rights reserved. You are hereby granted a
license to download and/or print a copy of this
document.
Any rights not expressly granted herein are
reserved.
*All implied warranties, including without
limitation the implied warranties of
merchantability or fitness for a particular
purpose, are excluded. In no event shall Sony or
its licensors be liable for incidental or
consequential damages of any nature, including
but not limited to lost profits or commercial loss,
arising out of the use of the information in this
document.
First released version (March 2015)
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Table of contents
Product overview ........................................................................................................2
Highlights ...............................................................................................................2
Product Specifications ..........................................................................................3
Categorised feature list ..........................................................................................6
Technologies in detail ...............................................................................................10
Device-to-device communications (local) ...........................................................10
ANT+™ wireless technology.............................................................................10
Bluetooth® wireless technology .......................................................................11
Wi-Fi® ...............................................................................................................12
DLNA Certified® (Digital Living Network Alliance) ............................................13
Messaging ...........................................................................................................14
MMS (Multimedia Messaging Service)..............................................................14
Email .................................................................................................................14
Positioning – location based services .................................................................15
Provisioning (OMA CP) ........................................................................................15
Multimedia (audio, image and video) ...................................................................16
Synchronisation (OMA DS, EAS, Google Sync™) ...............................................18
Web browser .......................................................................................................18
Memory in Android™ devices .............................................................................19
Trademarks and acknowledgements ..................................................................23
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Product overview
Highlights
•
•
•
•
Connectivity: Wi-Fi MIMO (up to 867 Mbit/s) and 4G LTE Cat 6 (up to 300 Mbps)
Display: 10.1” 2560x1600 WQXGA, Triluminos™ display with X-Reality™ for mobile
Audio: Hi-Res audio, Digital Sound Enhancement Engine (DSEE HX) technology.
Gaming: PS4® Remote Play, Snapdragon 810 Octa-core 64 bit processor for speed, Wi-Fi MIMO for
PS4® connectivity.
• Camera: 5.1 MP wide angle front camera
• Accessories (Optional): Sony Bluetooth® Keyboard BKB50
High-speed and high-performance
When you’re multi-tasking over Wi-Fi or a 4G network, Xperia™ Z4 Tablet delivers the speed you need.
Download email with attachments in seconds and enjoy video streaming with no delays or unwanted
buffering. The Xperia™ Z4 Tablet is powered by a 64-bit Snapdragon processor for a faster web browsing
experience and optimal graphics performance.
Long-lasting battery
Whether you use your Xperia™ Z4 Tablet for business or pleasure or both, you will be impressed by its
battery performance. You can spend a day sending and receiving email, accessing the web for whatever
you need and running as many apps as you want.
Sight and sound
Enjoy your favorite movies, your most memorable moments and the YouTube™ clips you want to see over
and over again with the Xperia™ Z4 Tablet. The Xperia™ Z4 Tablet comes with a 2K resolution display
built on Sony TV technology and a powerful set of front stereo speakers. The Xperia™ Z4 Tablet even
supports High-Resolution Audio and digital noise cancelling for a superior audio experience with reduced
distortion and noise.
Play to win
Keep playing your favorite PlayStation®4 games wherever you are in your home. With PS4™ Remote Play
and a DUALSHOCK4® game controller, your Xperia™ Z4 Tablet keeps you in the game just the way you
like it.
Efficiency away from the office
With the Sony Xperia™ Z4 Tablet keyboard and cover stand, you get a laptop style touchpad, laptop
ergonomics, efficient text input and a complete office experience while working on the go.
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Product Specifications
Operating system
Google™ Android™ 5.0 (Lollipop)
Processor
2 GHz / 1.5 GHz Qualcomm Snapdragon 810 Octa Core 64-bit
CPU
GPU
Adreno 430
Size
167 x 254 x 6.1 mm
Weight
393 grams
Available colours
Black, White
SIM card
Nano SIM
Main screen
Colours
16,777,216 colour TFT
Resolution
WQXGA 2560x1600 pixels
Size (diagonal)
10.1 inches
Scratch-resistant
Chemical tempered glass + Anti-fingerprint coating
Input mechanisms
Text input
On-screen QWERTY keyboard
Touch screen
Capacitive
Touch gesture
10-finger multi-touch support
Memory
RAM
3 GB
Flash memory
Up to 32 GB*
Expansion slot
microSD™ card, up to 128 GB (SDXC supported)
Memory card speed class
Class 10**
Memory card UHS speed
class
Class 1**
Camera
Camera resolution
8.1 MP
Digital zoom
8x
Video recording
1080p HD
Front Camera
1080p HP for video chat
5.1 MP for still photos
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ISO
Supports up to ISO 1600 in Manual mode
Supports up to ISO 3200 in Low Light mode (Photo)
Supports up to ISO 2000 in Night scene mode (Video)
Minimum focus distance
100 mm
Sensors
Accelerometer
Yes
Ambient light sensor
Yes
Hall sensor
Yes
Magnetometer
Yes
Gyroscope
Yes
Networks
SGP771
UMTS HSPA+ 850 (Band V), 900 (Band VIII), 1900 (Band II),
2100 (Band I) MHz
GSM GPRS/EDGE 850, 900, 1800, 1900 MHz
LTE Band I, Band II, Band III, Band IV, Band V, Band VII, Band
VIII, Band XII, Band XVII, Band XX, Band XXVIII, Band XL
Data transfer speeds
GSM GPRS
Up to 107 kbps
GSM EDGE
Up to 296 kbps
UMTS HSPA+ Cat 6
Up to 5.8 Mbps (upload)
UMTS HSPA+ Cat 24
Up to 42 Mbps (download)
LTE Cat 6
Up to 50 Mbps (upload), up to 300 Mbps (download)
Battery performance
Talk time (GSM)
TBD***
Standby (GSM)
TBD***
Talk time (UMTS)
TBD***
Standby (UMTS)
TBD***
Standby (LTE)
TBD***
Audio playback
TBD***
Video playback
TBD Up to 17 hours***
Battery
Embedded 6000 mAh minimum
* Memory comprises approximately TBD GB of firmware, plus TBD GB of “Internal storage” for music, pictures, movies, downloaded applications and personal data. For more details about memory, see “Memory
in Android™ devices” on page 19.
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** This device meets the minimum hardware requirements to support Class 10 / UHS Speed Class 1 Flash
memory. Flash memory performance is dependent on the application and task being performed on the
device. If you would like to know about your memory card, refer to the technical specifications that came
with the card.
*** Values are according to GSM Association Battery Life Measurement Technique as performed in controlled laboratory conditions. Actual time may vary.
NOTE: Battery performance may vary depending on network conditions and configurations, and device
usage.
NOTE: The performance results provided are measured under controlled laboratory conditions.
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Categorised feature list
Camera
Music
Search
8.1 MP Sony Exmor RS® main
camera
5.1 MP Sony Exmor R® front
camera
8x digital zoom
Auto focus
Burst mode
HDR for photos and movies
Face detection
Geotagging
HD video recording (1080p)
Image stabiliser
Object tracking
Picture Effect
Quick Launch
Scene recognition
Self-timer
Send to web
Smile Shutter™
Superior Auto
Sweep Panorama
Touch capture
Touch focus
White balance
Album art
Bluetooth® stereo (aptX®, A2DP)
ClearAudio+
Clear Bass™
Clear Phase™
Clear stereo
DSEE HX***
Digital Noise Cancelling
Dynamic normaliser
Hi-Res Audio
Low power audio playback***
Music tones (MP3/AAC)
S-Force Front Surround
SensMe™
Stereo speakers
TrackID™ music recognition*
Walkman® application
What's new*
xLOUD™ Experience
Bookmarks
Google Chrome™*
Google Play™*
Google™ search*
Google Voice™ Search*
Google Maps™ for Mobile with
Street view*
Play Books
Play movies & TV
Play Games
Sony Select
Xperia™ Home
Web browser (WebKit™)*
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Communication
Messaging
Design
Call list*
Facebook™ application*
Google+*
Hangouts™*
Noise suppression
Polyphonic ringtones
Speakerphone
Slow talk
Talk equaliser
Twitter™ application*
Voice enhancement*
VoLTE*
Xperia™ Socialife*
Email
Google Mail™*
Handwriting recognition
Predictive text input
Sound recorder
Auto rotation
Battery STAMINA mode
Direct touch
Face Unlock
Gesture input
IPX5 and IPX8 (waterproof)**
IP6X (Dust protected)
On-screen QWERTY keyboard
Screenshot capturing
screen recoding
Throw
X-Reality™ for mobile
Touch screen
Triluminos™ Display for mobile
Voice input
Wallpaper
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Entertainment
Organiser
Connectivity
Media browser
Motion gaming
PS4™ Remote Play
Radio (FM radio with RDS*)
SensMe™ slideshow
Sony Entertainment Network*
TV launcher
Video streaming
YouTube™*
Airplane mode
Alarm clock
Battery STAMINA mode
Calculator
Calendar
Contacts
eCompass™
Setup guide
Sketch
Stopwatch
Timer
3.5 mm audio jack with Digital
Noise Cancelling (DNC)
ANT+™ support
aGPS*
BeiDou
Bluetooth® 4.1
Chromecast support
Compass
DLNA Certified®
GLONASS
HDCP
High-Res Audio via 3.5 mm audio
jack and USB
MHL 3.0 support + 5-pin support
Media Go™
Media Transfer Protocol support
Micro USB support
Microsoft® Exchange
ActiveSync®
Miracast™
Native USB tethering
NFC
PC Companion
Remote control application
Screen mirroring
Screen recoding
Smart Connect
Synchronisation via Facebook™
Synchronisation via Google™*
Synchronisation via SyncML™
TV SideView
USB charging
USB High speed 2.0 support
Wi-Fi®
Wi-Fi® Hotspot functionality
Xperia Link™
* This service is not available in all markets.
** The Xperia™ Z4 Tablet is waterproof and protected against dust as long as you follow a few simple
instructions: all attached covers are firmly closed; you can’t take the tablet deeper than 1.5m of water and
for longer than 30 minutes; and the water should be fresh water. Casual use in chlorinated pools is
permitted provided it’s rinsed in fresh water afterwards. No seawater and no salt water pools. Abuse and
improper use of device will invalidate warranty. The tablet has an Ingress Protection rating of IP65 and
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IP68. To see what this means and for more information see www.sonymobile.com/durability. Do note that
the Xperia™ Z4 Tablet has a capless USB port to connect and charge your tablet. The USB port needs to
be fully dried up before charging if the tablet has been exposed to water.
*** This feature is only available when you play music using the Walkman® application.
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Technologies in detail
The information presented in this section is a general overview of the technology incorporated into the
product. However, hardware and software levels of compliance to standards and specifications vary
between products and markets. For more information, contact Sony Mobile Developer World or the
relevant Sony representative.
Device-to-device communications (local)
ANT+™ wireless technology
Compatible devices
Some ANT+™ compatible devices may require installation of additional software.
Frequency band
2.4 GHz
Data transfer rate
Up to 60 Kbps
Encryption
AES-128
Topologies
One to Many, Many to One, Peer to Peer, Star, Practical
Mesh
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Bluetooth® wireless technology
Bluetooth® Profiles supported
Advanced Audio Distribution Profile v1.2
Audio/Video Remote Control Profile v1.3
Handsfree Profile v1.6* (Wide band speech)
Headset Profile v1.2
Object Push Profile v1.2
Phonebook Access Profile v1.1*
Message Access Profile v1.1
Generic Attribute Profile Client/Server over LE
Device ID Profile v1.3
Human Interface Device Profile v1.0
Personal Area Networking Profile v1.0
Serial Port Profile v1.1
HID over GATT 1.0
Core version and supported
core features
Version 4.1
Bluetooth® Low Energy
Other supported features
aptX® CD quality audio streaming over Bluetooth®
LDAC High sound quality audio streaming over Bluetooth®
Connectable devices
Products supporting at least one of the profiles above.
BT4.1 accessories generally require installation of a supporting application.
* This service is not available in all markets.
More information:
www.sonymobile.com/developer
www.bluetooth.com
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Wi-Fi®
Supported standards
IEEE 802.11a/b/g/n/ac MIMO and Wi-Fi®
Wi-Fi Direct™, Wi-Fi Protected Setup (STA and AP
modes), Wi-Fi CERTIFIED Miracast™, Wi-Fi CERTIFIED
ac™, Wi-Fi CERTIFIED Passpoint™
Connectable devices
Wi-Fi® access points
Wi-Fi Direct compatible devices
Frequency band
2.4 GHz / 5 GHz
Data transfer rate
Up to 867 Mbit/s
Security
WEP Open Authentication
WEP Shared Authentication
WPA Personal and WPA2 Personal
WPA Enterprise and WPA2 Enterprise
EAP-SIM
EAP-AKA
EAP-TLS
EAP-TTLS/MSCHAPv2
PEAPv0/EAP-MSCHAPv2
PEAPv1/EAP-GTC
Encryption
WEP 64 bit, WEP 128 bit, TKIP and CCMP (AES)
Power save
WMM-PS
QoS
WMM
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DLNA Certified® (Digital Living Network Alliance)
Supported Device Classes
M-DMS – Mobile Digital Media Server
Media Types: images, music and video
Summary: The digital media server exposes the media
files in your device to a Wi-Fi® network. The files can
then be accessed from other DLNA Certified® clients.
+PU+
Media Types: image, video and music
Summary: Play media in the tablet on another device,
such as a TV or computer using 2 box push technology.
+PU+ is integrated in the Album, Movies and WALKMAN
applications.
M-DMC – Mobile Digital Media Controller
Media Types: image, video and music
Summary: Digital Media Controllers find content offered
by a DMS or M-DMS and match it to the rendering capabilities of a DMR — setting up the connections between
the DMS and DMR.
M-DMP – Mobile Digital Media Player
Media Types: image, video and music
Summary: Play content stored on another device, for
example, a server or a PC, directly on the tablet.
+DN+
Media Types: image, video and music
Summary: Download content stored on another device,
for example, a server or a PC, and play the downloaded
content directly on the tablet.
+UDO+
Media Types: image, video and music
Summary: The digital media server also has the capability
to get uploaded files from other DLNA Certified® clients.
Supported Bearers
Wi-Fi®
DRM Support
The DLNA Certified® implementation does not support
DRM-protected content.
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Messaging
MMS (Multimedia Messaging Service)
According to OMA Multimedia Messaging Service v1.0 + SMIL
Email
Bearer type (IP)
GPRS, EGPRS, UMTS, LTE
Character sets
BIG5 Traditional Chinese
GB18030
ISO-2022-JP Japanese
ISO-8859-1
ISO-8859-2 Eastern Europe
ISO-8859-5 Cyrillic
ISO-8859-7 Greek
ISO-8859-9 Turkish
ISO 8859-11
KOI8-R Cyrillic
Shift_JIS Japanese
USASCII
UTF-16
UTF-8
Windows® 874
Windows® 1251 Cyrillic
Windows® 1252
Windows® 1254 Turkish
Windows® 1258 Vietnamese
Protocols
POP3 and IMAP4
Push email
Microsoft® Exchange ActiveSync® (EAS)
IMAP4 Idle (RFC2177)
Secure email
SSL/TLS, both port methods (POPS/IMAPS) and STARTTLS
HTML mail
Yes (read only)
More information:
www.sonymobile.com/developer
www.openmobilealliance.org
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Positioning – location based services
Supported standards:
• OMA Secure User Plane Location (SUPL) v1.0 & v2.0
• 3GPP™ Control Plane location
• Qualcomm® GPSOneXtra™
Supported satellite systems:
• GPS
• GLONASS
• BeiDou*
NOTE: When needed, the device automatically uses a combination of all available satellite systems to
accurately provide location information.
* BeiDou satellites are not used for providing location information in U.S. territory.
Provisioning (OMA CP)
OMA CP version 1.1
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Multimedia (audio, image and video)
Audio Playback
Audio Recording
Image Playback
Image Capture
Decoder format
Supported file formats
AAC (AAC-LC, AAC+, eAAC+,
AAC-ELD)
3GPP (.3gp, 3gpp), MP4 (.mp4,
.m4a), ADTS (.aac)
ALAC
MP4 (.m4a)
AMR-NB, AMR-WB
3GPP (.3gp, .3gpp), MP4 (.mp4,
.m4a), AMR (.amr, .awb)
DSD
DSF (.dsf), DSDIFF (.dff)
FLAC
FLAC (.flac), Matroska (.mka)
MIDI
SMF (.mid), XMF (.xmf), Mobile
XMF (.mxmf), OTA (.ota), RTTTL
(.rtttl), RTX (.rtx), iMelody (imy)
MP3
MP3 (.mp3)
PCM
WAV (.wav)
Vorbis
OGG (.ogg), Matroska (.mkv)
WMA
ASF (.wma)
Opus
Opus (.opus), Matroska (.mkv)
Encoder format
Supported file formats
AAC (AAC-LC, AAC+, AAC-ELD)
3GPP (.3gp, .3gpp), MP4 (.mp4,
.m4a)
AMR (AMR-NB, AMR-WB)
3GPP (.3gp, .3gpp), MP4 (.mp4,
.m4a), AMR (.amr)
Decoder format
Supported file formats
BMP
BMP (.bmp)
GIF
GIF (.gif)
JPEG
JPEG (.jpg, .jpeg)
PNG
PNG (.png)
WebP
WebP (.webp)
Encoder format
Supported file formats
JPEG
JPEG (.jpg)
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Video Playback
Decoder format
Supported file formats
MPEG-4
3GPP (.3gp, .3gpp), MP4 (.mp4,
.m4v), Matroska (.mkv), AVI
(.avi), Xvid (.xvid)
H.263
3GPP (.3gp, .3gpp), MP4 (.mp4,
.m4v)
H.264
3GPP (.3gp, .3gpp), MP4 (.mp4,
.m4v), Matroska (.mkv)
H.265
MP4 (.mp4, .m4v)
VP8
WebM (.webm), Matroska (.mkv)
VP9
WebM (.webm)
Encoder format
Supported file formats
MPEG-4
3GPP (.3gp), MP4 (.mp4)
H.263
3GPP (.3gp), MP4 (.mp4)
H.264
3GPP (.3gp), MP4 (.mp4)
Audio/Video Streaming
Streaming transport
HLS
HTTP progressive streaming
RTSP
Digital Rights Management (DRM)
Supports DRM-protected downloaded content
OMA DRM v1.0
Marlin DRM
Widevine Level 1
PlayReady DRM (available in
specific regions)
Video Recording
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Synchronisation (OMA DS, EAS, Google Sync™)
OMA Data Synchronisation protocol versions 1.1.2 and 1.2
OMA Data Formats: vCard 2.1, vCalendar 1.0
Microsoft® Exchange ActiveSync® protocol version 2.5
Microsoft® Exchange ActiveSync® protocol version 12
Microsoft® Exchange ActiveSync® protocol version 12.1
Microsoft® Exchange ActiveSync® protocol version 14
Microsoft® Exchange ActiveSync® protocol version 14.1
Google Sync™
Related information:
www.sonymobile.com/developer
Web browser
Google Chrome™ for Android™ is pre-installed in markets/regions where no restrictions apply.
Related information:
https://play.google.com/store/apps/details?id=com.android.chrome
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Memory in Android™ devices
To use Android devices efficiently, users should be aware of the different types of device memory. This
knowledge is important in order to understand, for example, where data such as music, photos and
videos is saved; how many apps can be downloaded from Google Play™; and how photos can be copied
to a PC.
Information regarding memory presented in this section may be useful to developers when optimising
applications for mobile devices.
Generally, all Android devices share the same basic memory setup. What differs is how much memory is
available to you via the different types of memory, and whether your device uses an external SD card or an
internal memory chip. Any information specific to the particular device model described in this White
Paper is noted as such.
Types of memory
The types of memory described and numbered below are consistent with the terminology used in Sony
mobile device menus and in other content relating to 2015 Xperia™ devices:
1. Dynamic Memory (also known as RAM) is used by applications that run when the device is turned on.
The amount of Dynamic Memory influences how many applications and operating system services can
run at the same time. The Android operating system automatically closes applications and services
that are not being used.
However, such automatic functionality has limits. For example, if a lower amount of free RAM is
available to applications after a new release of the operating system (due to increased capabilities in
the system), device speed will eventually be impacted. This is the main reason that a device cannot be
indefinitely upgraded to newer releases of Android™.
If you experience problems with RAM, for example, if the device runs slower than usual or if the Home
application restarts frequently when you leave an application, you should minimise the use of apps that
run all the time. Social networking apps that connect and update their data online and animated
backgrounds are examples of apps that are always running and affect RAM performance. To minimise
RAM issues, you could also consider using a static wallpaper instead of a live wallpaper.
To see which apps and services are currently active, go to Settings > Apps > Running. You should
have at least 50 MB, and ideally 100 MB or more, of free RAM to avoid slowdowns and application
restarts.
You should also be aware that if you update the device to a later Android release, the load on the builtin Dynamic Memory will increase due to the addition of more features. As a result, the device may run
slower after an update.
The Xperia™ Z4 Tablet has 1 GB of RAM available to the Android OS and any installed applications.
200 MB of the total RAM is in use during normal operation when the user starts using the device out of
the box.
2. System Memory (also known as “System partition” or “/system”) is used for the Android OS and for
most applications that are pre-loaded from the factory. This type of memory is normally locked, and
can only be changed through a firmware upgrade. There is usually some free space available in this
section of memory. However, since it is locked, you cannot save apps, photos or any other content to
this memory. System Memory is reserved for future firmware upgrades, which almost always need
more memory than the original firmware. You cannot see or influence the use of this memory.
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3. Internal Storage is referred to as "working" memory. It can be compared to the C: drive on a PC or
to the startup disk on a Mac.
This type of memory is used to store all application downloaded from the Google Play™ Store (and
other sources) as well as their settings and data (such as emails, messages and calendar events, for
example). All applications have an allocated area for application data. Memory dedicated to an
application is inaccessible to other applications.
Some game applications also store content such as game music and game level information outside
their own designated area. In most cases, an application can choose to save its data in a location of its
own choosing (outside the protected application settings area). Generally, such content is not deleted
when an application is uninstalled; it must be removed manually by connecting the device to a
computer with a USB cable, or by using a file manager application.
Internal storage is also used for all added user content. For example, photos taken using the device's
camera, media files downloaded from the Internet and file transfers are stored in this area. Typical user
content includes:
• photos
• movies
• music
• Email attachments
Internal Storage will tend to fill up as a result of normal usage. Devices with a large initial Internal
Storage can handle more applications and store more user content.
If the Internal Storage starts to get full, the device slows down, and in some cases it might no longer be
possible to install more apps. You should always ensure that you have at least 100 MB of free Internal
Storage. If not, you should consider removing some apps that you seldom use, or move content that
you do not frequently access to external storage.
You can see approximately how much Internal Storage is free in Settings > Storage > DEVICE
MEMORY. You can also view more details about how much memory is used by applications under
Settings > Apps. In the Xperia™ Z4 Tablet, about TBD GB of Internal Storage is available out of the
box.
Please note that in Sony Mobile 2015 products, “Internal Storage” is now the combination of what was
previously known as “Device Memory” or “Phone Memory” (for applications and their data – also
previously known as “/data”) and “Internal Storage” (for user’s content – also previously known as “/
sdcard”). The changes in Internal Storage were made so that memory usage could be more flexible
and to allow encryption of user content.
Memory card slot
Some products include both a large internal memory and a built-in memory card reader. Android manages
devices with a built-in memory card reader and internal memory differently from a device that includes
only a built-in memory card reader.
Since most applications expect only a single location for storage, such applications will not generally
allow you to SAVE anything to the memory card (i.e., they do not offer the option to choose a storage
location). However, some applications (for instance, the Sony Mobile “Camera” application) may actually
allow you to do so. Other applications, for example, backup applications such as the Sony Mobile
“Memory” application, will by definition be configured to copy content from the Internal Storage to the
external SD card.
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On the other hand, when it comes to reading from an external SD Card, you will be able to access content
(for example, videos, photos and music) on a memory card inserted in this slot without any special
consideration since the Android system searches all available memory for content. Therefore, such
products may be regarded as supporting a fourth type of memory, called “External Card” or “SD Card”.
4. SD Card (known as “/ext_card” from a programmer’s point of view, or by other names in other Android
products) is the name for the removable SD memory card in all 2015 Sony Mobile products. As
described in the previous section, this External Card memory is generally more limited in that any
application can read from it, but many applications cannot save to this card. Only a few applications,
including backup applications and file manger applications, have the capability to save to this card.
Backing up data to different memory types
Generally, you should not save photos, videos and other personal content solely on the internal memory
of a device. If something should happen with the hardware, or if the device is lost or stolen, the data
stored on the device’s internal memory is gone forever.
In a device where an SD card reader is the main memory, it is relatively easy to take the card out and copy
all content to a PC or Mac, or to an entertainment device with a memory card slot. In a product featuring
Internal Storage as the main memory, it is not possible to physically remove the memory. Instead, any
critical or high-value content must either be copied to an external SD card by a special backup
application, transferred to remote storage over a network (mobile or Wi-Fi), or to a computer via a USB
cable.
To facilitate the transfer of data via a cable, the Xperia™ Z4 Tablet supports Media Transfer Protocol
(MTP), which makes it possible to easily transfer content back and forth between your device and a
Windows® PC. For Apple™ Mac® computers, a special application called Sony Bridge for Mac is
available with built-in support for MTP. This application can be downloaded from the Xperia™ Z4 Tablet
support page.
Note that you do not need to back up or make a copy of applications that you have downloaded from the
Google Play™ Store. They can normally be downloaded again after you have set up your Google account
to work in a new device (or in a device where the memory has been completely erased).
Note 1:
Some Android devices, including Sony Mobile devices from 2012 and Sony Ericsson devices from 2011
and earlier, do not use a single “Internal Storage” for both applications (and their data) and user content.
Instead, these devices use either an external SD card for user content, or a corresponding area of internal
memory to reproduce the functionality of an SD card. In such devices, there is a fixed limit between the
application area (“/data”) and the user content area (“/sdcard”), with the result that user content can build
up and reach this limit. When the user content reaches this limit, no additional data can be added using
any application. For example, the camera application would no longer be able to capture additional
photos even if a considerable amount of free space was available in the application area. This limit also
applies to the application area. Downloading and installing new applications would not be possible even if
there was enough free memory in the user content area.
Note 2:
Some devices with integrated storage have abandoned the distinction between the application area and
the content area when it comes to a Factory Data Reset. As a result, there is no option in such devices to
perform a Factory Data Reset and preserve content. In such devices, all content is completely deleted
from the device when a reset is performed.
In contrast, Sony Mobile’s memory integration solution makes it possible to preserve user content in this
situation. Therefore, when performing a Factory Data Reset, the default action will still be to only remove
applications and their data, and an option box must be checked if all content is to be removed as well (as
might be desirable when selling the device second-hand).
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Note 3:
For a developer, it is important to note that from a programming point of view the location names used to
refer to the different memory areas described in Note 1 are still valid, i.e., the area used for applications (“/
data”) is still present, as is the area used for content (“/sdcard”).
In reality, “sdcard” is a “symbolic link” to “/data/media”. However, from inside an Android application, “/
sdcard” can still be used. For example, you can use “sdcard/DCIM/100Android” to find all camera
images. The continued use of “/sdcard” to access the content area ensures compatibility across different
products and Android releases in this regard.
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Trademarks and acknowledgements
All product and company names mentioned herein are the trademarks or registered trademarks of their
respective owners. Any rights not expressly granted herein are reserved. All other trademarks are property
of their respective owners.
Visit www.sonymobile.com for more information.
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