SD data

[fiju007]

Why cant I transfer some  data from my  internal memory to a external SD card. I only have the option to xfer all data using  setting-> storage-->xfer data to SD.  I also do not have the option to xfer from SD to the phone. 

[arturiu]

Memory management on an Android phone has to deal with many factors, in order to make the phone reliable and secure. You will find that some memory areas are reserved for the firmware and operating system, which are not supposed to be changed by the user.

Please have a look at this faq, which explains in detail how memory is splitted according to it's usage:

http://talk.sonymobile.com/t5/FAQ/Memory-in-Android-devices/m-p/348064#U348064