I have TWO (2) brand new cables in sealed plastic that connect a SA8300HD DVR running SARA software to an external drive. If you have this model DVR and your cable company is running SARA then you can greatly expand the number of hours or HD recording time by adding an external drive. To do this you'll need an external drive, case, and these cables. The cables are SATA I to SATA II External Cable and are the exact same ones listed in this AVSForum thread: http://www.avsforum.com/avs-vb/showt...&&#post5277957 http://www.cruzsystems.com/COMAX-PDF/221303D.pdf I bought too many and getting rid of my extra stock. Price is $15.00/ea. shipped to US/Canasa. (More for outside USA). Thanks for looking.