TEYES DVR Installation & Fault Finding
Check the recorder and saved files
A live preview or flashing LED does not prove a usable recording was saved. Check that a recent recording can be opened.
For the TEYES DVR used with CC3, CC3 2K, CC2 Plus, CC3L and LUX One, the maximum microSD capacity is 32 GB. This does not specify the capacity of separate 360 recording storage or newer recorder boxes.
Save required recordings before formatting or changing storage. A replacement card has restored recording in confirmed cases, but card failure is not the cause of every recording problem.
The legacy menu steps below apply only where they match your model. A reboot is not a factory reset. Back up stored data and settings before any reset.
Confirm the red light flashing on the DVR
If there is a red light flashing - skip to step 4
If no red light is flashing proceed with the below steps -
STEP 1 - Go to Settings - Device - Apps - DVR - Force App Closed
Reopen app to see if resolved, if is not go on to Step 2
STEP 2 - Swipe the screen down and select “Reboot”
Reopen app to see if resolved, if is not go on to Step 3
STEP 3 - If support recommends a factory reset, first save your settings and personal data, then use the reset guide for your exact model. The legacy CC3 menu is Settings - User - Backup/Reset - 168 - Clear All Data. This erases stored data.
STEP 4 - Check that the camera plug is not bent. This can cause other issues as stated here

STEP 5 - If the DVR app is just frozen and will only let you exit, first save any required recordings, then format the compatible microSD card on a PC and then re-insert it. If that does not work, try a different microSD card.