Two Ports on the Moo3 support USB.
1. Std female USB-A Port Used to plug in mouse /keyboard/usb drive.2. 30pin 'apple' connector Used connect to PC for data transfer or debugging sessionswhen using the std USB port you can use an android file manager. I like the es file explorer. Files on the usb stick can be found in /usb.tap the / button then find the /usb folder and tap to open. Use copy paste to transfer files.also many media aps will allow you to go to /usb to play video, mucis, whatever.the 30 pin port temp removes the sdcard from android and allows your PCto see it like a thumb drive.At your PC open a file manager and open the new device you can copy paste etc with your PC tools.When you eject the device and remove the cable files will be in /sdcard.I have a lot of problem with the 30pin connector not working for me. so I do file trransfer over the wireless connection.see the wiki how to for details Wiki