- Check if you can solve the conundrum by changing drive letters around in such a way that the media files are still addressed after the move by the same drive letter (and file path and file names). Usually the best way, if you want to replace an existing media drive with a larger one.
- if you run out of storage space, and are forced to distribute media, which were previously stored on one drive, onto several different drives for more storage space, consider the usage of “drive pooling”, which creates one big virtual drive out of several physical drives. So afterwards all your media are still accessible under the same, single drive letter.
- if 1) and 2) are not viable, you might want to make direct edits to the Plex server database: [HowTo] Plex database modification - Moving media the right/wrong way - #10 by jelwell
All of the above of course while Plex server is completely stopped.
