Disclaimer: I offer archiving and IT services.
I make an LTO backup
Yes,
Please Please Please, do NOT rely on spinning disks. If you use hard drives in the short term you should have the files in at least three places, one of which is in a location separate from your editing computer. The Academy and others have white papers on proper archiving and the procedures of some film libraries.
I am surprised that some folks that a notalentwannabe like myself looks to for guidance are not on top of this issue. We stand to loose many movies.
Sincerely,
Robert A. Ober