For archiving my masters, I've been saving my raw 24bit master along with the FLAC files of the final 24 bit master and then back both up on a separate harddrive which I store in an off-site location. I don't save the 16bit versions since they're derivatives from the 24bit master anyway and can be re-created later if need be.
It occurred to me today that after several years of using this practice, I don't think I've ever once gone back to my raw master file and re-used it for any reason. I've used the FLACs (mostly to make 16bit versions for burning CDs), but not the raw master.
When I originally saved the raw master, I had the idea that I should keep the raw master in case I ever wanted to re-master the show.
Now since half of my archive space is being taken up by these raw masters, I'm wondering if it's a waste of harddrive space to save the original raw master since I have all the FLACs in two places anyway. If I needed to, I could re-build an un-cut version of the show, but of course it wouldn't always be the same as the raw master although I try not to do too much post-processing to my shows.
I'd probably still keep all of my M/S raw masters (where one channel is the mid and the other is the side), since those can't be reverse engineered very easily.
Anybody else have strong feelings one way or the other about keeping their raw masters?
If you keep them, are you like me in that you never use them?