What Bob said plus let me emphasize BACKUP TO TAPE.
All of folks you that continue to use drives for long term storage are asking for trouble. We are loosing movies and other creative output because folks are not backing up/archiving to tape.
Did I mention you should BACKUP TO TAPE. As Bob mention that currently would be LTO6. And not LTFS IMHO.
Believe it or not, the best long term storage, particularly for “finished” movies is film. Kodak has products specifically designed for long term archiving.
Good luck with your upgrading,
Robert A. Ober