I’m running Mint, and have an external USB drive plugged in. It is not powered - it gets its power from the mini-PC.
Occasionally I get this message and I’ve no idea why. It might be after rebooting the machine but I’m not sure (sorry).
The only thing I did with the drive is rename it (to “1tbDrive”). Could that be the problem? (I did that in the Disks application).
The people who are into using the CLI have likely already been using Linux for a long time, most of the rest of is who have more recently migrated, or want to migrate want to use the GUI. I am one of the latter :)