Locked file obstructing Time Machine
Time Machine can't back up because of a single audio file that's been on my hard drive for two years, about as long as I've had Time Machine's external hard drive. But suddenly, they don't agree. I'm trying to trash the file in question, but it doesn't respond to being dragged to the trash. When I get info, the line that says it's locked is grayed out. Selecting "remove download" (since this file was originally downloaded) gets me a window that tells me it can't be removed because "Resources busy."
Any ideas on how to deal with this greatly appreciated. I don't care what happens to this file; I just want Time Machine back in action again. (Incidentally, my operating system is Sequoia 15.3.1—an option not offered below, under "select a topic" [?].)
MacBook Air 13″, macOS 15.3