Does the TerraMaster F2-221 have a single Gigabit port?

Yes, the TerraMaster F2-221 ships with only one Gigabit Ethernet port — no second port for link aggregation and no 2.5GbE or 10GbE upgrade path. For a basic two-bay NAS serving one user, it gets the job done, but it lacks the dual-port redundancy many buyers expect.