It's really important both to backup the FDE keys and have regular backups. I lost a volume to BitLocker AES-XTS 256 earlier this year and luckily only lost a

It's really important both to backup the FDE keys and have regular backups. I lost a volume to BitLocker AES-XTS 256 earlier this year and luckily only lost a few days of work. I've since substantially improved my backups and even rotate a disk offsite weekly now.