Safepoint wont update automatically

Scheduled Safepoints are not working for me.

WD My Cloud Gen 1
Firmware v04.05.00-342

Attempting to Schedule Safepoints via USB to a WD My Book.

Manual Safepoints work fine. Only Scheduled Safepoints do not work.

I have already attempted the steps detailed here (I’ve also repeated these steps, deleting any existing Safepoints on the USB drive):