USB

The USB connection in most tablets can be used to sync with a computer for transferring files and photos. You can also use your tablet with the doubleTwist app to transfer your music from your iTunes library, although you may want to skip the USB connection and store your iTunes library in the cloud with Google Music. I'll discuss this in more detail in Chapter 21: “Listening to Music.”

Nearly every tablet will have a USB connection. But when you shop for tablets, you may want to make sure it's a standard connection, so you can use third party cords and other accessories.

You'll also want to check to see if you can use the USB port to charge the tablet. In many cases, such as the Motorola Xoom, the answer is going to be “no.” The Galaxy Tab 10.1 does offer this feature. Third-party USB battery backups are useless for any device that can't charge via USB.