XR750

Samsung DVR SRD-470D Last week I backed up some footage onto an external hard drive, so that I could examine it at home. It's in .BU & .DB2 format. Will not play on PC with VLC in any Demux mode. It will not play in Amped Five. Isn't recognised in any video conversion software. Have even tried MKV Toolnix GUI. What are my options? Can I reload it back on the DVR and back up again as an AVI? Any help would be much appreciated. Thanks.

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