Hardware Specifications:
CPU:
CPU Model:Intel Celeron J3355
CPU Architecture:64-bit
CPU Frequency:Dual Core 2.0 burst up to 2.5 GHz
Hardware Encryption Engine (AES-NI):Yes
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:2 GB DDR3L
Memory Module Pre-installed:2GB (1 x 2GB)
Total Memory Slots:2
Memory Expandable up to:6 GB (2 GB + 4 GB)

Storage:
Drive Bays:2
Compatible Drive Type :3.5" SATA HDD
2.5" SATA HDD
2.5" SATA SSD
Maximum Internal Raw Capacity:20 TB (10 TB drive x 2) (Capacity may vary by RAID types)
Maximum Single Volume Size:108 TB
Hot Swappable Drive:Yes
Notes:"Compatible drive type" indicates the 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 single volume size is not directly related to the maximum raw capacity.
Expansion of the internal volume is only supported if the combined single volume size does not exceed the maximum limit of 108TB.

External Ports:
RJ-45 1GbE LAN Port:1
USB 3.0 Port:3
eSATA Port:1
USBCopy:Yes

File System:
Internal Drives:Btrfs
EXT4
External Drives:Btrfs
EXT4
EXT3
FAT
NTFS
HFS+
exFAT
Notes:exFAT Access is purchased separately in Package Center.

Others:
System Fan:92 mm x 92 mm x 1 pcs
Fan Speed Mode:Full-Speed Mode
Cool Mode
Quiet Mode
Brightness adjustable front LED indicators:Yes
Power Recovery:Yes
Noise Level:19.3 dB(A)
Scheduled Power On/Off:Yes
Wake on LAN/WAN:Yes
Power Supply Unit / Adapter:60W
AC Input Power Voltage:100V to 240V AC
Power Frequency:50/60 Hz, Single Phase
Power Consumption:17.23 W (Access)
5.4 W (HDD Hibernation)
British Thermal Unit:58.79 BTU/hr (Access)
18.43 BTU/hr (HDD Hibernation)

Environment Temperature:
Operating Temperature:5 ^o C to 40 ^o C (40 ^o F to 104 ^o F)
Storage Temperature:-20 ^o C to 60 ^o C (-5 ^o F to 140 ^o F)
Relative Humidity:5% to 95% RH
Certification:
FCC Class B
CE Class B
BSMI Class B
Notes:
Power consumption is measured when fully loaded with Western Digital 1TB WD10EFRX hard drive(s).

DSM Specifications:
Storage Management:
Maximum Internal Volume Number:256
Maximum iSCSI Target Number:32
Maximum iSCSI LUN:256
iSCSI LUN Clone/Snapshot, Windows ODX:Yes
Supported RAID Type:Synology Hybrid RAID
Basic
JBOD
RAID 0
RAID 1
RAID Migration:Basic to RAID 1
Volume Expansion with Larger HDDs:Synology Hybrid RAID
RAID 1
Volume Expansion by Adding a HDD:Synology Hybrid RAID

SSD Support:
SSD TRIM:Yes

File Sharing Capacity:
Maximum Local User Accounts:2048
Maximum Local Groups:256
Maximum Shared Folder:256
Maximum Shared Folder Sync Tasks:4
Maximum Concurrent CIFS/AFP/FTP Connections:500
Windows Access Control List (ACL) Integration:Yes
NFS Kerberos Authentication:Yes
Log Center:
Yes
Syslog Events per Second:400

Add-on Packages:
Antivirus by McAfee (Trial):
Yes
Central Management System:
Yes
Chat:
Yes
Maximum Users:1000
Notes:The number of concurrent HTTP connections for Chat was configured to the maximum.
CPU and RAM usage were both under 80% when the number of maximum users was reached.
For tested models with expandable memory, the maximum amount of RAM was installed.
Cloud Station Server:
Yes
Maximum Number of Concurrently Connected Devices:500
Maximum Number of Concurrently Connected Devices (with RAM expansion):1500
Maximum Number of Synced Files (btrfs):1,000,000 / single file reaction time 681 ms
Maximum Number of Synced Files (ext4):1,000,000 / single file reaction time 341 ms
Notes:The maximum number of concurrently connected devices refers to the maximum number of devices that can remain connected at the same time. For more information on file processing capability, please refer to the reaction time for file processing.
File reaction time refers to the preparation time required for other devices to start downloading a 1KByte file from a Synology NAS after the file has been added to the NAS. RAM expansion was not used during testing.
Non-encrypted shared folders were used during the aforementioned testing.
Document Viewer:
Yes
Download Station:
Yes
Maximum Concurrent Download Tasks:80
exFAT Access (optional) :
Yes
MailPlus / MailPlus Server:
Yes
Free Email Accounts:5 (Licenses required for additional accounts)
Recommended MailPlus Client Number:Up to 45 (Btrfs) / 45 (ext4)
Maximum Server Performance:181,000 (Btrfs) / 194,000 (ext4) emails per day, approx. 5.5 GB (Btrfs) / 5.9 GB (ext4)

Environment Packaging
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 1
Quick Installation Guide X 1
Optional Accessories:
Surveillance Device License Pack
D3NS1866L-4G RAM Module
VS360HD
VS960HD

Media Server
Yes
DLNA Compliance : Yes
Office
Yes
Maximum Users: 200
Maximum Simultaneous Editing Users: 60

Item Dimension (L inchxW inchxH inch)
10 x 5 x 7

Weight
3.00lb

Warranty Information
2 Years