dwoody1

I have a sentient M-Link cctv 4 channel 960H with 2 700TVL hi resolution security cameras. The problem i have got is no matter what format the usb is in, I keep getting file error when trying to back up from the dvr onto usb, I have had 3 breakins to my van this past month but cant back them up to view anybody had this issue and solved it, your advise would be great.