Few months back when I got my new SAMSUNG TABLET 2 - 7 INCHES. I WAS PUZZLED HOW TO SHIFT MY VIDEOS SONGS BOOKS etc to external SD card. I tried and found it very easy. Hope you must be doing it, if not tell me on this thread I will write in detail and your main memory will be empty available. But you can not copy/ shift your apps to external SD Card.
on the 4.2.2 update you can go to settings; apps and then a downloaded app. The app page may have an activen move to sdcard button. apps with widget won't run from SD. Pre-installed won't move(daaam! - love to shove Kindle to the SD)
If anyone has a work around for pre-installed, PLEASE post.