Use iPhone or iPod touch as an external hard drive I have an iPod touch 4g with 64GB storage space. Is there some way to store files of any file type on the device? I know that there are plenty of apps which let you share files via iTunes. Is there a way to make file storage independent from iTunes? Can I exchange data between a PC and a Mac that way?
I have read that you have to use Jailbreak to access the file system. Is there any other more "legitimate" way of doing this?
If you have any apps or music on there, there's probably less than fifty GB available.  If you are that low on space, you might be better off with  a 64GB USB drive or SD card.

DropBox, OneDrive, iCloud, and their several competitors make it easy to keep files on it, but they also keep a copy of the same files on your other device.