There’s a whole slew of apps that allow you to turn your iPhone into a wireless drive, like Air Sharing and MobileFilesPro. One of the first on the scene, however, was Data Case, a $6.99 app from Veiosoft.

DataCase works via Bonjour on your own Wireless internet connection, or via FTP. Basically, if you’re computer and iPhone/iPod Touch are on the same WiFi network, DataCase will allow you to drag files onto the iPhone from the Mac or PC. If you’re using a mac, the iPhone/iPod touch will pop into the “Shared” section on your sidebar. From here, you can open the folder up and start adding files to your iPhone/iPod.

This way, you can access an an array of file types such as Microsoft Office files, PDF files, Text files, Images, Audio files, or videos. It’s an easy way to add and view documents on your phone without having to go through iTunes or clutter up your inbox.

The app works really well, and I’d recommend it. For advanced users the FTP, HTTP, and AFP access is nice. What’s special is that DataCase offers more advanced security features, by allowing you to create and modify permissions for individual volumes. The interface isn’t as slick though, it’s a bit more expensive, and there are some missing file formats. You can check it out for yourself in the App Store.