lacie

I have a LaCie 5big NAS Pro that runs NAS OS 4 (from Seagate/LaCie). The OS has support for volume encryption, see this page https://www.seagate.com/gb/en/support/kb/nas-os-4x-setting-up-volume-encryption-006007en/ . However, my device doesn't support that option - that is, it doesn't appear...