Why is macOS forcibly renaming my USB drive? I have a USB Drive named "Cuthbert", and various apps use paths starting with /Volumes/Cuthbert when it is plugged in.  However, my laptop is putting it at /Volumes/Cuthbert 1, and won't let me rename it, even though there /Volumes/Cuthbert leads to nothing.  (It shows up when I ls, but does not show up in the Finder, and there is nothing there.)

What is going on?  How can I fix and prevent this frustrating situation?
Make sure you properly unmount the USB drive when you remove it. If a volume name already exists in a system and you try to add a volume with the same name it will append -n to the volume name.