A 1TB 2.5" SATA SSD (like a Crucial MX500) for the OS, and a 2TB 3.5" HDD for storage.
For those looking to add dedicated graphics or high-speed networking cards: 1x PCIe x16 slot (Version 3.0) 1x PCIe x1 slot Connectivity and Storage Ports acer veriton x4630g motherboard
If you buy this motherboard as a standalone unit, expect to keep it in the original Acer chassis. Transplanting it is a hassle requiring custom drilling or expensive adapter cables. A 1TB 2