SOLVED: Some Primary Posters Are Lost Without Fail

[Paft]

However Jellyfin stores images by default, that's what I'll be using. "C:\ProgramData\Jellyfin\Server" by default?

The NAS is (x2 HDD) storage only. JF server is installed on the PC. The handful of movies with poster issues are not on the NAS. It has only ever been those despite there being many more on the same drives.

Thanks for the replies.