What brand of external USB backup device does the DVR supports?
Below is the brand of USB hard disk we tested working: Western Digital: Passport External Hard DriveWDXML800UE . Top of page 17. Multiple users can’t login at the same time using administrative password. Answer: Multiple users can’t use administrative password to login at the same time. You need to setup a secondary password. Multiple users can only use the secondary password to login at the same time. (You can only setup the password on user 1. Other functions and users settings are reserved for future model; it won’t work on this model.) To modify the secondary user password, connect the DVR Viewer software to the DVR using administration password and click setup. Then go to “system” > “advanced setup” (figure 17).
