Apple Mac Pro 5.1 2009, 64gb Ram, SSD +2TB HDD, USB 3, 6-Core Xeon, RX580 8GB
It has a internal storage of 250GB SSD via SSD Caddy (for system), and 2 x 1TB HDD via standard Size slot. One HDD slot is still empty, waiting for your upgrade. It has been quickly upgraded to 64GB DDR 3 clocking with 1333Mhz.