TerraMaster F4-425

Pros

• +Four bays at the lowest per-bay entry price here — the cheapest way onto 4-drive RAID for a file hub
• +Intel Celeron N5095 quad-core handles single-stream 4K transcoding with AES-NI encryption
• +Tool-free Push-Lock drive trays make first setup and swaps quick
• +4GB DDR4 upgradeable to 16GB for headroom as containers and users grow

Cons

• −Single 2.5GbE port with no second NIC and no upgrade path — a bottleneck once a RAID array is busy
• −No M.2 NVMe slots at all, so no SSD caching or fast tier
• −TerraMaster TOS is less polished than Synology DSM for backup automation