4 Things to Know About the TerraMaster F4-421 NAS

It uses two Gigabit Ethernet ports with link aggregation support. You can combine both ports for increased throughput, but each port maxes out at 1Gbps.

It lacks 2.5GbE connectivity. Newer TerraMaster models offer faster 2.5GbE ports, so this is a notable limitation for high-speed transfers.

Link aggregation requires a compatible switch or router. You need a managed switch or router that supports link aggregation to benefit from the combined bandwidth.

It remains a capable option for an older four-bay NAS. For basic file sharing and backups, the F4-421 still works well, but it’s not ideal for demanding workloads.