No. The hard drive stores video. Password reset (even hardware reset) does not format the drive. However, a firmware re-flash might require reformatting the drive for compatibility – back up critical footage first.
If you have lost or forgotten the administrator password for your Euronet Digital Video Recorder (DVR), you can regain access by using the "Super Password" bypass method or by performing a hardware reset. euronet dvr password reset
Incorrect firmware bricks the DVR (shows a black screen forever). Only use this if the DVR has no critical footage and you are technically confident. euronet dvr password reset