3 Things to Know About the TrueNAS Mini X+’s SATA-Only Drive Bays
The drive bays support only 3.5-inch and 2.5-inch SATA hard drives and SSDs. There is no NVMe support in the drive bays.
This makes for a clean, predictable storage setup. You get SATA drives in and SATA drives out, with no surprises.
If you need NVMe storage, you will have to look elsewhere. The Mini X+ is designed for straightforward SATA-only configurations.