Synology DS918+ 4GB 4-Bay NAS DiskStation

Hardware Specs
Software Specs

CPU
CPU Model Intel Celeron J3455
CPU Architecture 64-bit
CPU Frequency Quad Core 1.5 (base) / 2.3 (burst) GHz
Hardware Encryption Engine (AES-NI)
Hardware Transcoding Engine H.264 (AVC), H.265 (HEVC), MPEG-2 and VC-1; maximum resolution: 4K (4096 x 2160); maximum frame rate per second (FPS): 30
Memory
System Memory 4 GB DDR3L
Memory Module Pre-installed 4 GB (4 GB x 1)
Total Memory Slots 2
Memory Expandable up to 8 GB (4 GB x 2)
Notes

Synology reserves the right to replace memory modules with the same or higher frequency based on supplier's product life cycle status. Rest assured that the compatibility and stability have been strictly verified with the same benchmark to ensure identical performance.
Please select Synology memory modules for optimum compatibility and reliability. Synology will not provide complete product warranty or technical support if non-Synology memory modules are used for memory expansion.

Storage
Drive Bays 4
Maximum Drive Bays with Expansion Unit 9
M.2 Drive Slots 2 (NVMe)
Compatible Drive Type* (See all supported drives)

3.5" SATA HDD
2.5" SATA HDD
2.5" SATA SSD
M.2 2280 NVMe SSD

Maximum Internal Raw Capacity 64 TB (16 TB drive x 4) (Capacity may vary by RAID types)
Maximum Raw Capacity with Expansion Units 144 TB (64 TB + 16 TB drive x 5) (Capacity may vary by RAID types)
Maximum Single Volume Size* 108 TB
Hot Swappable Drive
Notes

"Compatible drive type" indicates drives that have been tested to be compatible with Synology products. This term does not indicate the maximum connection speed of each drive bay.
The maximum raw capacity is not limited by the maximum single volume size. Synology NAS models may utilize capacities over the maximum single volume size as long as each volume created is below the limit. (Learn more)
Each internal volume (may consist of multiple drives) is expandable up to 108TB.

External Ports
RJ-45 1GbE LAN Port 2 (with Link Aggregation / Failover support)
USB 3.0 Port 2
eSATA Port 1
File System
Internal Drives

Btrfs
EXT4

External Drives

Btrfs
EXT4
EXT3
FAT
NTFS
HFS+
exFAT*

Notes exFAT Access is purchased separately in Package Center.
Appearance
Size (Height x Width x Depth) 166 mm x 199 mm x 223 mm
Weight 2.28 kg
Others
System Fan 92 mm x 92 mm x 2 pcs
Fan Speed Mode

Full-Speed Mode
Cool Mode
Quiet Mode

Brightness Adjustable Front LED Indicators
Power Recovery
Noise Level* 19.8 dB(A)
Scheduled Power On / Off
Wake on LAN / WAN
Power Supply Unit / Adapter 100 W
AC Input Power Voltage 100 V to 240 V AC
Power Frequency 50/60 Hz, Single Phase
Power Consumption* 28.8 W (Access)
12.6 W (HDD Hibernation)
British Thermal Unit 98.27 BTU/hr (Access)
42.99 BTU/hr (HDD Hibernation)
Notes

Power consumption is measured when it is fully loaded with Western Digital 1TB WD10EFRX hard drive(s).
Noise Level Testing Environment: Fully loaded with Seagate 2TB ST2000VN000 hard drive(s) in the idle state. Two G.R.A.S. Type 40AE microphones, each set up 1 meter away from the Synology NAS at the front and rear. Background noise: 16.49-17.51 dB(A); Temperature: 24.25-25.75?C; Humidity: 58.2-61.8%

Temperature
Operating Temperature 5C to 40C (40F to 104F)
Storage Temperature -20C to 60C (-5F to 140F)
Relative Humidity 5% to 95% RH
Certification

EAC
VCCI
CCC
RCM
KC
FCC
CE
BSMI

Warranty
3-year hardware warranty, extendable to 5-year coverage - EW201
Notes The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more)
Environment
RoHS Compliant
Packaging Content

Main Unit X 1
Accessory Pack X 1
AC Power Adapter X 1
AC Power Cord X 1
RJ-45 LAN Cable X 2
Quick Installation Guide X 1

Optional Accessories

D3NS1866L-4G DDR3 non-ECC SO-DIMM
Surveillance Device License Pack
Expansion Unit: DX517 X 1
VS360HD
VS960HD