Use an iPhone or iPod Touch in disk mode with DiskAid

One of the first things that iPhone and iPod Touch users noticed was the lack of a built-in "disk mode," where your device would appear on the desktop as a drive that you could use for file storage. Other iPod models even had a setting to specify how much of their storage space should be used for music, and how much should be used for disk mode, but the latest and greatest ones didn't. But thanks to an app called DiskAid, you can still transfer files between your iPhone and your Mac or PC without jailbreaking or using iTunes.

Sure, you may already know how to access a jailbroken iPhone's hard drive via SFTP, but that's a pain in the butt compared to DiskAid. You can just plug your device in, start it up, and start transferring files in a straightforward interface that anybody who's ever used Windows Explorer or the OS X Finder can figure out. As a brief disclaimer, realize that storing files on your iPhone doesn't mean your iPhone can interact with them. It's like putting music on an old iPod in disk mode: you can store it there, but you can't play it.

Source: downloadsquad.com