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White paper | Xperia™ E4 Dual
18 February 2015
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™ E4 Dual, about 5 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.