I don’t fucking know why I can’t eject USB hard drives. I installed the SysInternals apps, and best they can tell me is that Dropbox is fucking with the drives. I explicitly told Dropbox to not fuck with USB drives. I don’t know who’s lying, I just want whoever is fucking with the drives to stop fucking with the drives, OK??? OK.
I basically never have this problem on Linux.
I think programs can’t hold removable media busy by default on Debian. If you remove, you lose whatever changes aren’t there. Either way, Linux programs just read files and close them, they mostly don’t keep files open.