As what I know, the best file-management software for both Mac and PC is Diskaid, available from www.digidna.net/diskaid. it’s free, and it can be used with or without jailbreaking. Once your file-management software has been installed, start it up while the iPhone is connected to your computer. Once the software is loaded, you’ll see the basic, “safe” media directory. The drop-down menu in the lower left will allow you to access the root directory, which has the guts of the device.
Now with this software you can copy any file …