Most cable and satellite providers offer a DVR (digital video recorder) with the programming packages, allowing you to record television programming on the device's built-in hard drive. However, if you want to record digital television on your own hard drive and have the ability to connect it to your computer later, you need an external hard drive with an eSATA connection.
Power down the digital video recorder (most cable/satellite receivers have this built right into the receiver).
Insert the eSATA cable provided with the external hard drive into the eSATA connection port of the hard drive. This cable provides a faster data transfer than that provided by both USB and FireWire.
Plug the other end of the eSATA cable into the eSATA connection port on the rear of the digital video recorder.
Power on the hard drive then the DVR. The DVR automatically detects the connected external hard drive and records all selected programming onto the hooked-up hard drive.