The TerraMaster F4-423 adds NVMe to its predecessor's SATA foundation

Unlike the F4-421, the F4-423 includes two M.2 NVMe slots that work for caching or as actual storage. The four SATA bays still accept any mix of 3.5-inch and 2.5-inch drives. It’s a meaningful generational step — now you can run an NVMe storage pool alongside your SATA array.