Overwriting a NAS when storage is full or a percentage full

Hi, so far I am understanding: You want to use the RN 214 as Storage like an endless recorder for video streams? Mhhm the easiest way would be to use an external usb disk and to attach it. Otherwise you have to use the ssh console and to get into deep ReadyNas OS Linux internals and program a shell script, which - so far I see on your reputation - would be end into fatal situation - and then you have either to use a expensive recovery company or to reset your readynas to default (which in fact is also fatal for you). So far there is no simple solution for that what you want.... (Oh wait just another "guru" will you tellin you that's wrong, just to get some reputation - But believe me, this is currently not possible easy)