4 Things to Know About the TerraMaster F4-421

It has four SATA bays and nothing else No M.2 slots, no NVMe cache, and no expansion options. The F4-421 is a pure 4-bay SATA storage device.

It accepts both 3.5-inch and 2.5-inch drives You can use HDDs or SSDs in all four bays. This gives you flexibility in drive choice.

It lacks modern caching features There is no support for NVMe or M.2 caching. This limits performance for workloads that benefit from fast cache.

It works best for simple SATA arrays If your workload fits on a straightforward SATA setup, this TerraMaster delivers without complications. Avoid it if you need expansion or caching.