Just wondering if anyone has successfully added an external eSATA hard drive to their Comcast DVR? According to Comcast it is possible, but the only hard drive they officially support is the WD MyBook AV Comcast, which Comcast sells for $125, but they say other drives may or may not work. That is a bit much for a 1TB drive. Just wondering if anyone has tried to add an eSATA drive and the results. Thanks.