External SD won't stay mounted

[orgelbau]

I'm running Venom. I have to remount the external SD card several times per day. It will not remain mounted. Any ideas?

 

[orgelbau]

Well, just today the phone prompted me to move the save location for camera photos to the external SD card after snapping a shot. I did so and the problem is gone. Seems weird that this would be the cause, but I'm not complaining.