Can't fully unmount TimeMachine drive in Disk Utility
M1 Macbook, MacOS 11.2.x, new LaCie portable drive, reformatted & setup for Time Machine, drive seems to be operating just fine, but if I want to unmount the drive in Disk Utility, there is still a volume [LaCie Mobile Drive Volume] that is not greyed out, and clicking on the eject symbol does nothing. I don't want to risk damaging the drive or directory by manually disconnecting the drive, but on the other hand I don't want to be tethered to the external drive either. That's part of owning a laptop, especially one with a good battery — the option to take it anywhere, anytime, without stuff connected to it. I never experienced this issue with any prior OS. Currently I've been shutting it down before disconnecting the backup drive. Any insight on this issue would be appreciated!
MBP M1 MacOS 11.2.1