the password cannot contains the same sequences of characters as the old password.

That’s a weird way to say “we store your password in plaintext”

Ten years is a long time. In ten years 4Tb storage will be less than a crappy thumb drive.

For reliant storage I personally would get two hdd for a price of one ssd, slap a software raid1 with ext4 on them and forget about them until the mdadm alerts