Depends wholly on the type of file and the available software.
mp3tag for instance can set metadata on several files at once. It can even extract (parts) of the file name and put them into various different meta tags.
After changing the order, you must ‘Refresh Metadata’.
It will however only make a difference if the file is ‘matched’ to an online metadata agent.
If your files are ‘unmatchable’, you will either have to disable the Local Media Assets agent or remove the metadata from the files prior to putting them into Plex.
Simply removing metadata can be done with several software solutions, also on many files in batches.
