We have found that in many cases a recorder rebooting all the time can indicate that the lock tab (write protect tab) on the SD card has been inadvertently pushed into the locked position as shown in the included picture.
This can happen when cards are inserted into recorders, USB adapters or computer SD card readers. Please check that the tab is NOT in the locked position before use for correct recorder operation.
We have also seen cases where the SD card reader or USB adapter has a problem recognising that the lock switch is in the correct unlocked position.
Another sign that this is the case is when you open VDANALZYER to save a configuration update and an error is reported about not being able to access the SD card.