I purchased this 1TB Western Digital My Book AV DVR Expander in hopes of providing more storage capacity for our Motorola DCX3400 HD dual tuner DVR. At first this was a failed attempt. Do to the fact that Comcast hadn’t enabled external hard drive usage with their DVR’s in our area. About a month after this purchase – Comcast finally enabled external drive use.
Officially Comcast only supports Western Digital’s My Book AV DVR Expander as an external drive for their DVR’s. In theory any hard drive with an eSATA cable should work – maybe with USB cable also. Comcast states to only use a maximum 1TB drive. Larger drive sizes are not supported and may or may not work.
This also may be true depending on what model DVR you are using. I am using a Motorola DCX3400 HD DVR dual tuner. The DCX3400 is not on the official support list at this time. During testing some issues were reported and a new firmware is being designed to provide a better customer experience when a external hard drive is used with a DCX3400 DVR. All that being said – some Comcast customers have had no problems running an external drive with a Motorola dual tuner DCX3400 HD DVR.
I made a Western Digital My Book AV DVR Expander purchase because it was the model that had official approval and had been tested by Comcast.
A little further down below is a link that shows this hard drive in operation. It also shows the before and after process of getting the hardware to work with Comcast.
This hard drive and others would work for any cable or satellite provider who offers external drives as an option for more content recordings and storage.
“Western Digital’s My Book AV DVR Expander is the external hard drive that has been tested and approved to work with Comcast DVRs, and provides an additional one terabyte of storage.”