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Product Details

CPUCPU ModelIntel Celeron J4025 
 CPU Quantity
 CPU Architecture64-bit 
 CPU Frequency2-core 2.0 (base) / 2.9 (burst) GHz 
 Hardware Encryption Engine (AES-NI) 
MemorySystem Memory2 GB DDR4 non-ECC 
 Total Memory Slots
 Maximum Memory Capacity6 GB (2 GB + 4 GB) 
  • 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.


StorageDrive Bays
 M.2 Drive Slots2 (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


 Hot Swappable Drive* 
  • The hot swappable drive feature is not supported by M.2 SSD slots.
  • "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 PortsRJ-45 1GbE LAN Port2 (with Link Aggregation / Failover support) 
 USB 3.2 Gen 1 Port*
 NotesThe USB 3.0 standard was renamed to USB 3.2 Gen 1 by the USB Implementers Forum (USB-IF) in 2019. 
File SystemInternal Drives
  • Btrfs
  • EXT4


 External Drives
  • Btrfs
  • EXT4
  • EXT3
  • FAT
  • NTFS
  • HFS+
  • exFAT


 NotesexFAT 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. 
AppearanceSize (Height x Width x Depth)166 mm x 199 mm x 223 mm 
 Weight2.18 kg 
OthersSystem Fan92 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 / Adapter90 W 
 AC Input Power Voltage100V to 240V AC 
 Power Frequency50/60 Hz, Single Phase 
 Power Consumption28.30 W (Access) 
8.45 W (HDD Hibernation) 
 British Thermal Unit96.5 BTU/hr (Access) 
28.81 BTU/hr (HDD Hibernation) 
  • 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%


TemperatureOperating Temperature0°C to 40°C (32°F to 104°F) 
 Storage Temperature-20°C to 60°C (-5°F to 140°F) 
 Relative Humidity5% to 95% RH 
  • FCC
  • CE
  • BSMI
  • EAC
  • CCC
  • KC
  • VCCI
  • RCM


Warranty3-year hardware warranty, extendable to 5 years with Extended Warranty Plus 
  • 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. (Learn more)


EnvironmentRoHS 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
  • 3.5" SATA HDD: HAT5300
  • 2.5" SATA SSD: SAT5210
  • M.2 2280 NVMe SSD: SNV3410
  • VisualStation: VS360HD
  • Surveillance Device License Pack


 NotesAll memory modules will operate at the maximum frequency specified by the CPU manufacturer.