I have configure mine GXV3504 that by motion of the cameras the images and the video is storage on the local USB stick (Live Storage in the menu options). When the disk is full, the earliest video or images will be deleted. When the disk is full this mechanisme will work fine, but only for a couple of days. Than it stop storage any new video’s or images. When I umount the USB-stick and remount it again its works fine again for a couple of days.
I have tested it with different USB-sticks of SD-cards. And all the same issue.
I use the laters firmware (18.104.22.168), but the core version is 22.214.171.124 and the hardware version is V0.3B
Is this a commen problem and maybe is there a solution for it.