Disk Bays: 5 x 3.5"/2.5" SATA HDD/SSD drive bays2.
Maximum Internal Net Total Storage Capacity: Varies depending on the drive capacity and RAID configuration. With 5 x 16TB drives, it can reach 80TB. With 15 drives (using 2 DX517 expansion units), it can reach up to 240TB.
Maximum Single Storage Space Capacity: 108TB.
SSD Cache: 2 x M.2 2280 NVMe SSD cache slots.
Network Interface: 4 x RJ-45 1GbE ports with link aggregation and failover support. There is also a dedicated expansion interface for 10GbE network upgrade module (E10G22-T1-MINI).
USB Interface: 2 x USB 3.0/3.1/3.2 Gen 1 ports2.
eSATA Interface: 2 x eSATA ports2.
System Specifications
Pre-installed Software System: Synology DiskStation Manager (DSM), supports file systems such as BTRFS, EXT4 for internal disks, and BTRFS, EXT3, EXT4, FAT32, HFS+, NTFS, exFAT for external disks.
Cooling System: 2 x 92mm fans.
Physical Characteristics
Product Dimensions: 9.17 x 9.06 x 6.54 inches / 232.92 x 230.12 x 166.12 mm.
Product Weight: 5.9 lb / 2.7 kg2.
Power Specifications
AC Input Voltage: 100 - 240V AC, 50/60Hz.
Power Supply/Transformer: 120W PSU2.
Power Consumption: 52.06W (Typical), 16.71W (Idle).