Features

Two built-in M.2 2280 NVMe SSD slots permit cache acceleration without occupying storage drive bays.
Intel quad-core processor with AES-NI hardware encryption engine, over 225 MB/s sequential read and write throughput.
4 GB DDR4 memory (expandable up to 8 GB); Scalable up to 9 drives with Synology DX517
Average 15% performance boost to photo indexing and other computing-intensive operations, as well as database response time.
By default, two camera licenses are installed; extra licenses can be purchased (CLP1, CLP4, or CLP8)

Specifications

Hardware Specs CPU
CPU Model	Intel Celeron J4125
CPU Quantity	1
CPU Architecture	64-bit
CPU Frequency	4-core 2.0 (base) / 2.7 (burst) GHz
Hardware Encryption Engine (AES-NI)	Yes
Memory
System Memory	4 GB DDR4 non-ECC
Total Memory Slots	1
Maximum Memory Capacity	8 GB (4 GB + 4 GB)
Notes	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.
	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.
Storage
Drive Bays	4
Maximum Drive Bays with Expansion Unit	9 (DX517 x 1)
M.2 Drive Slots	2 (NVMe)
Compatible Drive Type*	3.5" SATA HDD
	2.5" SATA HDD
	2.5" SATA SSD
	M.2 2280 NVMe SSD
Hot Swappable Drive	Yes
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.
External Ports
RJ-45 1GbE LAN Port	2 (with Link Aggregation / Failover support)
Max. number of LAN ports	2
USB 3.2 Gen 1 Port*	2
eSATA Port	1
Notes	The USB 3.0 standard was renamed to USB 3.2 Gen 1 by the USB Implementers Forum (USB-IF) in 2019.
File System
Internal Drives	Btrfs
	EXT4
External Drives	Btrfs
	EXT4
	EXT3
	FAT
	NTFS
	HFS+
	exFAT
Notes	exFAT Access can be installed for free from Package Center in DSM 7.0. In DSM 6.2 or earlier versions, exFAT Access needs to be purchased in Package Center.
Appearance
Size (Height x Width x Depth)	166 mm x 199 mm x 223 mm
Weight	2.24 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	Yes
Power Recovery	Yes
Noise Level*	19.8 dB(A)
Scheduled Power On / Off	Yes
Wake on LAN / WAN	Yes
Power Supply Unit / Adapter	100 W
AC Input Power Voltage	100V to 240V AC
Power Frequency	50/60 Hz, Single Phase
Power Consumption*	32.17 W (Access)
	9.69 W (HDD Hibernation)
British Thermal Unit	109.84 BTU/hr (Access)
	33.09 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	0∞C to 40∞C (32∞F to 104∞F)
Storage Temperature	-20∞C to 60∞C (-5∞F to 140∞F)
Relative Humidity	5% to 95% RH
Certification	FCC
	CE
	BSMI
	EAC
	CCC
	KC
	VCCI
	RCM
Warranty	3 Years
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	DDR4 non-ECC SODIMM: D4NESO-2666-4G
	Expansion Units: DX517
	3.5" SATA HDD: HAT5300
	2.5" SATA SSD: SAT5210
	M.2 2280 NVMe SSD: SNV3410
	VisualStation: VS360HD
	Surveillance Device License Pack
Software Specs DSM Specifications
Storage Management
Maximum Single Volume Size*	108 TB
Maximum Internal Volume Number	64
SSD Read / Write Cache (White Paper)	Yes
SSD TRIM	Yes
Supported RAID Type	Synology Hybrid RAID
	Basic
	JBOD
	RAID 0
	RAID 1
	RAID 5
	RAID 6
	RAID 10
RAID Migration	Basic to RAID 1
	Basic to RAID 5
	RAID 1 to RAID 5
	RAID 5 to RAID 6
Volume Expansion with Larger HDDs	Synology Hybrid RAID
	RAID 1
	RAID 5
	RAID 6
	RAID 10
Volume Expansion by Adding a HDD	Synology Hybrid RAID
	JBOD
	RAID 5
	RAID 6 (with Expansion Unit)
Global Hot Spare Supported RAID Type	Synology Hybrid RAID
	RAID 1
	RAID 5
	RAID 6 (with Expansion Unit)
	RAID 10 (with Expansion Unit)
Notes	Each internal volume (may consist of multiple drives) is expandable up to 108TB.
	Usable capacity for each volume will be lower than the maximum volume size and is dependent on the filesystem and the amount of system metadata stored.
File Services
File Protocol	SMB/AFP/NFS/FTP/WebDAV
Maximum Concurrent SMB/AFP/FTP Connections	1,000
Maximum Concurrent SMB/AFP/FTP Connections (with RAM expansion)	2,000
Windows Access Control List (ACL) Integration	Yes
NFS Kerberos Authentication	Yes
Notes	Regarding data concerning tests with RAM expansion, all memory slots are installed with the maximum capacity of supported RAM.
	The testing standard was based on the maximum number of concurrent connections supported by this model. During the testing, 25% of the connections were used to transfer files concurrently. The transfer process guaranteed that the connections were not interrupted; the minimum transfer speed was not guaranteed.
Account & Shared Folder
Maximum Local User Accounts	2,048
Maximum Local Groups	256
Maximum Shared Folder	512
Maximum Shared Folder Sync Tasks	16
Hybrid Share
Hybrid Share Folder Number	10
Notes	For more supported details, please check this article.
High Availability
Synology High Availability	Yes
Log Center
Syslog Events per Second	800
Virtualization
VMware vSphere with VAAI
Windows Server 2016	Yes
Windows Server 2019	Yes
Citrix Ready	Yes
OpenStack	Yes
General Specifications
Networking Protocols	SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV
Supported Browsers	Google Chrome
	Firefox
	Microsoft Edge
	Safari
Supported Language	English, Deutsch, FranÁais, Italiano, EspaÒol, Dansk, Norsk, Svenska, Nederlands, ???????, Polski, Magyar, PortuguÍs do Brasil, PortuguÍs Europeu, T¸rkÁe, ?esk˝, ???????, ???, ???, ????, ????
Notes	For an updated list of supported browser versions, check the DSM Technical Specifications.
Antivirus by McAfee (Trial)	Yes
Central Management System	Yes
Synology Chat
Maximum Users	1,500
Maximum Number of Concurrent Users	100
Notes	When applicable, tested systems are configured with maximum memory and set to allow the maximum number of connections.
Document Viewer	Yes
Download Station
Maximum Concurrent Download Tasks	80
SAN Manager
Maximum iSCSI Target Number	128
Maximum LUN	256
LUN Clone/Snapshot, Windows ODX	Yes
Notes	iSCSI Manager has been renamed to SAN Manager in DSM 7.0.
Synology MailPlus / MailPlus Server
Free Email Accounts	5 (Licenses required for additional accounts)
Maximum Number of Concurrent Users	100
Maximum Server Performance	1,224,000 emails per day, approx. 37GB
Notes	Models with more than 4 bays were installed with two SSDs for SSD cache.
	For tested models with expandable memory, the maximum amount of RAM was installed.
	The performance of the mail system will slightly decrease in high-availability mode due to data synchronization between the two servers.
	Functions that were enabled in all of the tests above: anti-spam, anti-virus, DNSBL, greylist, content scan, full-text search (English only).
Media Server
DLNA Compliance	Yes
Synology Photos
Facial Recognition	Yes
Notes	Photo Station and Synology Moments are succeeded by Synology Photos in DSM 7.0. For a features comparison, check this article.
Snapshot Replication
Maximum Snapshots per Shared Folder	1,024
Maximum of System Snapshots	65,536
Surveillance Station
Maximum IP cam (Licenses required)	40 (including 2 Free License) (see all supported IP cameras)
Total FPS (H.264)	1200 FPS @ 720p (1280x720)
	1050 FPS @ 1080p (1920x1080)
	600 FPS @ 3M (2048x1536)
	360 FPS @ 5M (2591x1944)
	200 FPS @ 4K (3840x2160)
Total FPS (H.265)	1200 FPS @ 720p (1280x720)
	1200 FPS @ 1080p (1920x1080)
	1000 FPS @ 3M (2048x1536)
	600 FPS @ 5M (2591x1944)
	300 FPS @ 4K (3840x2160)
Total FPS (MJPEG)	680 FPS @ 720p (1280x720)
	400 FPS @ 1080p (1920x1080)
	300 FPS @ 3M (2048x1536)
	200 FPS @ 5M (2591x1944)
Notes	Maximum IP cameras and FPS figures are tested with the device fully populated with drives and under a continuous recording setup.
	Actual system capabilities may differ depending on system configuration, drive performance, number of features enabled, and if additional workloads are present.
Synology Drive
Recommended Number of Concurrent Sync Clients	350 (the number of connections that can be maintained when the recommended number of hosted files was reached)
Recommended Number of Hosted Files	5,000,000 (applies to files indexed or hosted by Synology Drive. For file access through other standard protocols, refer to the File Services section above)
Notes	Exceeding the recommended numbers above will not block application operations, but may result in longer response time.
	Utilizing SSD cache can significantly improve performance.
	For tested models with expandable memory, the maximum amount of RAM was installed.
	Btrfs file system and non-encrypted shared folders were used during the aforementioned testing.
Synology Office
Maximum Users	1,200
Notes	Multiple files were opened for testing and each file was edited by 30 users simultaneously.
	For tested models with expandable memory, the maximum amount of RAM was installed.
	Client performance may affect maximum simultaneous editing users. Client PCs used for testing: Intel Core i3-3220 / 8GB RAM
Video Station	Yes
Virtual Machine Manager
Recommended Virtual Machine Instances	4 (Learn more)
Recommended Virtual DSM Number (Licenses required)	4 (including 1 Free License)
Notes	The specifications vary depending on system configuration and memory size.
VPN Server
Maximum Connections	40

*Note: The actual colors may be different from the color displayed here. Features, Price and Specifications are subject to change without notice.

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