have question when i sync with itunes
I have i pad 1. i have some questions regarding synchronizing. I usually download e books from my dropbox app on ipad and then i save in
ibooks...b'se its easy....but when i synch my ipad with itunes in my pc, it erase all of my ibooks that i got through dropbox or sometimes i saved from emails. and also it erase all changes i made in my music playist directly in ipad...b'se sometime if i don't like some songs so i delete in that or move to other album.. my all changes got deleted and i got whatever in i tunes.. could you help me in this, how can i keep all my stuff as it is what i didn't get it through itunes..