I had an old- non "approved" HD on my DVR that died and want to replace it. The recommended units seem expensive for what they provide so I purchased a Fantom 3TB eSATA HD [Fantom Drives 3TB GForce3 USB 3.0/eSATA Aluminum External Hard Drive (GF3B3000EU)]. When I hook it up to the DVR and follow the procedure to connect it, the DVR reboots and reboots and reboots........ turning the external drive on and off and never recognizing it. I thought it might be due to the formatting or partition size on the new hard drive (which works fine via USB 3.0 on my Windows 10 computer) so I tried various schemes of NTSB vs exFAT and naming vs not naming the partitions and drive partition size. I keep having the same issue. Help, please. (....Or, should I just return the drive and buy the smaller more expensive WD drive?)