Things You'll Need
Instructions
Connect your ATA hard drive to the ATA to USB 2.0 adapter and plug the USB 2.0 adapter into an open USB slot on your computer.
Open Partition Manager to format the hard drive. If the hard drive is less than 32 gigabytes, you can format it using “Computer Management” in the “Administrative Tools” section of your computer’s Control Panel. If the drive is larger than 32GB, you will need a partition software like Partition Manager.
Select the ATA hard drive and create a new FAT32 hard drive partition. This will clear everything off of the hard drive, so make sure no important data is stored on it.
Select “Format” to format the FAT32 partition on the ATA hard drive.
Disconnect the hard drive from your computer and connect it to your Xbox 360. You can now use it as a storage device to watch movies and play music without taking up space on your regular Xbox 360 hard drive.