No Hard Drive, 1TB, 5400rpm (Serial-ATA II), 1TB, 7200rpm (Serial-ATA III), 1TB, 5400rpm SSHD (Serial-ATA III) Seagate Firecuda 2.5” HDD, 2TB, 5400rpm (Serial-ATA III), 250GB Samsung 850 EVO SSD (Up to Sequential Read 540MB/s – Turbo Write 520MB/s Serial-ATA III), 500GB Samsung 850 EVO SSD (Up to Sequential Read 540MB/s – Turbo Write 520MB/s Serial-ATA III), 1TB Samsung 850 EVO SSD (Up to Sequential Read 540MB/s – Turbo Write 520MB/s Serial-ATA III), 2TB Samsung 850 EVO SSD (Up to Sequential Read 540MB/s – Turbo Write 520MB/s Serial-ATA III), 4TB Samsung 850 EVO SSD (Up to Sequential Read 540MB/s – Turbo Write 520MB/s Serial-ATA III), 1TB Samsung 850 Pro SSD (Up to Sequential Read 550MB/s – Write 520MB/s Serial-ATA III), 2TB Samsung 850 Pro SSD (Up to Sequential Read 550MB/s – Write 520MB/s Serial-ATA III)