Free Shipping! Synology 40TB Storage Capacity, 5 x 8TB 7200 rpm SATA III 3.5" HDDs, For the Synology DiskStation DS1817+, For the Synology DiskStation DS1517+, 5 x 3.5"/2.5" SATA Drive Bays, 1 x eSATA Port, Hot-Swappable & Screwless Design