I get the safe part, we keep ours in a vault. But it's what to store them in while they're there. The turtle cases look quite bulky.
This came up because someone was reviewing the tapes and managed to drop a whole bunch of them on the floor (data integrity risk right there). Because we have an 18 month review of each tape to check integrity and 6 year replacement strategy, I was hoping that there was some sort of drawer system available so they could be reviewed safely.