It has been a while since I reviewed a TerraMaster NAS, but the company reached out to me asking if I was willing to test the F4-425 Pro, which goes on sale today. It is an upgrade on the F4-425 Plus, which I reviewed back in October 2025

What you need to know is that it basically follows the design principles of the four-bay F4-425 series, with its all-metal exterior.

Here are the most important specifications:

TerraMaster F4-425 Pro

CPU Intel Core N350 (8x E Cores/Threads, Max burst up to 3.9 GHz)