content: This isn't the best one I've owned but it's simple and it did the job. It ran an old 4700 RPM ATA laptop hard drive straight from USB.The first time I plugged in the USB then plugged in the HD... that was bad. Don't do that.1. Plug in the drive to the converter, make sure it's snug and on a flat surface where it won't get damaged.2. Plug in the USB, preferably to a USB plug on the back of the computer (if accessible) because they're just more stable.3. Wait a while for the drive to spin up (if applicable) and you're golden.It comes with a bunch of cables that can be useful for system builders ... or drives that need the juice (as it was intended). Good luck.