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White paper | Xperia™ E dual
19 December 2012
5. External Card (also known as “/ext_card”) is the name for the removable SD memory card in products
where there is also Internal Memory and where this Internal Memory is referred to in the phone’s user
interface as the “sdcard” memory. This External Card memory can generally not be written to from the
phone, but it can be used (by the user) to store content from other sources. For example, you can write
to this memory from a PC when the phone is connected to a PC and when the External Card is
mounted. Some applications on the phone may in some cases, however, also have permissions to
write to the External 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 phone. If something should happen with the hardware, or if the phone is lost or stolen, the data stored
on the phone’s internal memory is gone forever.
In a phone 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 transferred over a network (mobile or Wi-Fi®) or via a cable.
To facilitate the transfer of data via a cable, the Xperia™ E dual supports the Microsoft standard, Media
Transfer Protocol (MTP), which makes it possible to easily transfer content back and forth between your
phone and a PC. For Apple Mac computers, a special application is available with built-in support for
MTP. This application can be downloaded from the Xperia™ E dual support page. Note that you do not
need to back up or make a copy of applications that you downloaded from Google Play™. They can
normally be downloaded again if you have set up a Google account to work in your phone. You can find
the apps which you have purchased under “My apps” in Google Play™, so you will not need to either pay
for or search for them again.