: New drives often show up as "Unknown" or "Not Initialized" in Disk Management . You must right-click the disk and select Initialize Disk (using GPT) before you can format it for use.
: High-performance NVMe drives in external enclosures often require more power than a standard USB 2.0 or poorly powered USB 3.0 port can provide, leading to "device not recognized" errors. jmicron generic scsi disk device
Updating bridge firmware incorrectly can brick the enclosure. : New drives often show up as "Unknown"