CPU Model:Intel Celeron J3355
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
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)
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.
RJ-45 1GbE LAN Port:1
USB 3.0 Port:3
Notes:exFAT Access is purchased separately in Package Center.
System Fan:92 mm x 92 mm x 1 pcs
Fan Speed Mode:Full-Speed Mode
Brightness adjustable front LED indicators: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)
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
FCC Class B
CE Class B
BSMI Class B
Power consumption is measured when fully loaded with Western Digital 1TB WD10EFRX hard drive(s).
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
RAID Migration:Basic to RAID 1
Volume Expansion with Larger HDDs:Synology Hybrid RAID
Volume Expansion by Adding a HDD:Synology Hybrid RAID
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
Syslog Events per Second:400
Antivirus by McAfee (Trial):
Central Management System:
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:
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.
Maximum Concurrent Download Tasks:80
exFAT Access (optional) :
MailPlus / MailPlus Server:
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)
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
Surveillance Device License Pack
D3NS1866L-4G RAM Module
DLNA Compliance : Yes
Maximum Users: 200
Maximum Simultaneous Editing Users: 60
Item Dimension (L inchxW inchxH inch)
11 x 10 x 5