3dsmaxed

i understand the logic now but the problem is i have to delete older videos from my dvr which i dont want right now as i i am getting a new dvr model but it will use the older hdd which has my videos. i dont want the engineer to see them. what if i format the hdd. will it reset the whole dvr? i mean will i have to reinstall all the software or however it works. or will it just clean up the old recordings and willl still work without any problem Thanks

thanks tom. so is it true about other cctv also or just hifocus? Thanks

Hi everyone i got some cctvs installed at my residence yesterday along with a DVR . my dvr is attached to my PC which i use to view.My dvr is hi focus AHD i want to know how can i delete recordings from my dvr? i would like to know how to do the following 1.) delete recording for a particular time slot for eg recording of 30 mins or 1 hr ona particular day from recorded footage. is it possible? 2.) delete recording of complete day? sorry this is very new for me and i am a noob here. please advise thanks