I noticed that whenever i open a file with another application, it copies the file to its directory. For example if i have a pdf in adobe reader and i open it in ibooks, ipad creates a second copy in ibooks directory before opening. So i now have 2 copies of same file at different locations and this is such a waste of space. It really bothers me since i own 16 gb ipad. I have jailbroken ipad. Is there a way i can stop it from a copy. And also i am deciding to buy camera connecting kit and use ifiles to view the stuff on memory card (to extend my ipads memory). But if it still makes a copy of whatever is in the memory card, then its not going to do me any good.