A:Answer The Lenovo Legion Tower 5i Gaming Desktop, model number 90NC00JAUS, ships with a 256GB M.2 2280 NVMe solid state hard drive in the primary hard drive position, with the Windows 10 Operating System stored here for quick boot up. The second archival hard drive is a 1TB mechanical 3.5-Inch 7200RPM hard drive and would be the location for all other files and programs that are not immediately in demand and/or not used as often. Capacity obviously is another determining factor with only 256GB available (approximately 150GB available to the user) on the SSD, storage on this drive will be limited by capacitiy.