I'm trying to replace sd card from 16 to 32 and would like to know how to use the sprint battery booster to transfer phone data to it and back to new sd card.
First off I've never heard of a Sprint battery booster.
Second just hook your phone up to pc, transfer all your files from old sdcard to a folder on your pc, remove old sd when finished transferring, insert new sd, then just transfer the files back to new sdcard.