I have many hundreds of series and find that I need to move them from one disc to another due to either running out of disc space or sometime because there is an issue with a disc.
When this happens I just move the various folders.
Sonarr naturally still expects the series to be where it was originally.
I can update Sonarr manually one at a time but that can take some time to do and as I have found; I invariably forget something when moving lots of stuff around.
As you know, if you go into the Add Series, Import Existing Series on Disc; if Sonarr finds a series that is already there and with a different path it displays a message that the series already exists in the database. I think it would be a useful enhancement to have an option for these series to change the path to the new location from within this screen.
Thanks
Glenn