CPU Model Intel Celeron J4125
CPU Architecture 64-bit
CPU Frequency 4-core 2.0 (base) / 2.7 (burst) GHz
Hardware Encryption Engine (AES-NI)
System Memory: 2 GB DDR4 non-ECC
Total Memory Slots 1
Maximum Memory Capacity: 6 GB (2 GB + 4 GB)
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 2
Compatible Drive Type* (See all supported drives)
3.5" SATA HDD/ 2.5" SATA SSD
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.
RJ-45 1GbE LAN Port 2 (with Link Aggregation / Failover support)
USB 3.2 Gen 1 Port* 2
Notes: This device's 1GbE LAN ports have a maximum transmission unit (MTU) size of 1,500 bytes. The USB 3.0 standard was renamed to USB 3.2 Gen 1 by the USB Implementers Forum (USB-IF) in 2019.
Internal Drives: Btrfs /EXT4
External Drives: Btrfs/EXT4/EXT3/FAT/NTFS/HFS+/exFAT
Appearance: Size (Height x Width x Depth) 165 mm x 108 mm x 232.2 mm
Weight: 1.30 kg
System Fan: 92 mm x 92 mm x 1 pcs
Fan Speed Mode: Full-Speed Mode/Cool Mode/Quiet Mode
Brightness Adjustable Front LED
Noise Level* 22 dB(A)
Scheduled Power On / Off
Wake on LAN / WAN
Power Supply Unit / Adapter: 60 W
AC Input Power Voltage: 100V to 240V AC
Power Frequency: 50/60 Hz, Single Phase
Power Consumption: 14.69 W (Access)/4.41 W (HDD Hibernation)
British Thermal Unit: 50.09 BTU/hr (Access)/15.04 BTU/hr (HDD Hibernation)
Notes: For more information on how power consumption is measured, refer to this article. Noise testing was conducted with the Synology system fully installed with Synology SATA HDDs and in an idle stae. Two G.R.A.S. Type 40AE microphones are placed at a 1 m distance from the front and rear of the device. 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
Notes: Availability varies by region. Before purchasing, please visit the official web pages of EW201/202 and Extended Warranty Plus for a list of eligible regions.The warranty period starts from the purchase date as stated on your purchase receipt.
Environment: RoHS Compliant
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
DDR4 non-ECC SODIMM: D4NESO-2666-4G
3.5" SATA HDD: HAT3300
Surveillance Device License Pack
Notes All memory modules will operate at the maximum frequency specified by the CPU manufacturer.
Maximum Single Volume Size: 108 TB
Maximum Internal Volume Number: 64
Supported RAID Type
Synology Hybrid RAID
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
Notes: 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. Actual maximum storage pool and volume sizes depend on drive sizes used, the number of drive bays available, and the RAID configuration.
File Protocol SMB/AFP/NFS/FTP/WebDAV
Maximum Concurrent SMB/AFP/FTP Connections: 500
Maximum Concurrent SMB/AFP/FTP Connections (with RAM expansion): 1,500
Windows Access Control List (ACL) Integration
NFS Kerberos Authentication
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 256
Maximum Shared Folder Sync Tasks 8
Hybrid Share: Hybrid Share Folder Number 10
Data & Folder Backup
Entire System Backup
Notes: Full-system backup requires DSM 7.2 or later.
High Availability: Synology High Availability
Log Center: Syslog Events per Second 800
General Specifications: Networking
Protocols SMB1 (CIFS), SMB2,
SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, HTTP, HTTPs, FTP,
SNMP, LDAP, CalDAV
Supported Language English, Deutsch, Français, Italiano, Español, Dansk, Norsk, Svenska, Nederlands, Polski, Magyar, Português do Brasil, Português Europeu, Türkçe, eský,
Notes: For an updated list of supported browser versions, check the DSM Technical Specifications.
Antivirus by McAfee (Trial)
Central Management System
Maximum Number of Concurrent Users 100
Notes: Measured with simulated users, each with an average record of 20,000 messages, emojis, or stickers. The required server response time is below ten seconds. When applicable, systems are tested configured with maximum memory and set to allow the maximum number of connections.
Maximum Concurrent Download Tasks 80
Maximum iSCSI Target Number 128
Maximum LUN 256
LUN Clone/Snapshot, Windows ODX
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: 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
Notes: Object recognition requires an upgrade of memory capacity to a minimum of 4 GB.
Snapshot Replication: Maximum Snapshots per Shared Folder 1,024/Maximum of System Snapshots 65,536
Surveillance Station: Maximum IP cam
(Licenses required) 25 (including 2 Free
License) (see all supported IP cameras)
Total FPS (H.264) 750 FPS @ 720p (1280x720)
750 FPS @ 1080p (1920x1080)
350 FPS @ 3M (2048x1536)
275 FPS @ 5M (2591x1944)
170 FPS @ 4K (3840x2160)
Total FPS (H.265) 750 FPS @ 720p (1280x720)
750 FPS @ 1080p (1920x1080)
600 FPS @ 3M (2048x1536)
475 FPS @ 5M (2591x1944)
200 FPS @ 4K (3840x2160)
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.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.
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
Virtual Machine Manager: Recommended Virtual Machine Instance/Recommended Virtual DSM
Notes: The specifications vary depending on system configuration and memory size.
VPN Server: Maximum Connections 40
Located in the Philippines!