Optimize performance and capacity

Synology DiskStation DS1520+ is an ideal network-attached storage solution suitable for small office and IT enthusiasts. Two built-in M.2 SSD slots and Synology SSD Cache technology allow you to boost system I/O and application performance. The scalable storage design of DS1520+ lets you start small and expand storage capacity with Synology DX517 as your data grows.


Expand up to 15 drives with a DX517 expansion unit


Average 19.8% boost to computing-intensive applications۱

Cache Acceleration

۲ x built-in M.2 2280 NVMe SSD slots


۴-core 2.0 GHz, burst up to 2.7 GHz

CPU Model Intel Celeron J4125
  CPU Quantity ۱
  CPU Architecture ۶۴-bit
  CPU Frequency ۴-core 2.0 (base) / 2.7 (burst) GHz
  Hardware Encryption Engine (AES-NI)  
System Memory ۸ GB DDR4 non-ECC SODIMM
  Memory Module Pre-installed ۸ GB (4 GB + 4 GB)
  Total Memory Slots ۱
  • 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.
Drive Bays ۵
  Maximum Drive Bays with Expansion Unit ۱۵ (DX517 x 2)
  M.2 Drive Slots ۲ (NVMe)
  Compatible Drive Type* (See all supported drives)
  • ۳.۵″ SATA HDD
  • ۲.۵″ SATA HDD
  • ۲.۵″ SATA SSD
  • M.2 2280 NVMe 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.
External Ports
RJ-45 1GbE LAN Port ۴ (with Link Aggregation / Failover support)
  USB 3.2 Gen 1 Port* ۲
  eSATA Port ۲
  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.
Size (Height x Width x Depth) ۱۶۶ mm x 230 mm x 223 mm
  Weight ۲.۶۲ kg
System Fan ۹۲ 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* ۲۰.۸ dB(A)
  Scheduled Power On / Off  
  Wake on LAN / WAN  
  Power Supply Unit / Adapter ۱۲۰ W
  AC Input Power Voltage ۱۰۰V to 240V AC
  Power Frequency ۵۰/۶۰ Hz, Single Phase
  Power Consumption* ۳۶.۶۷ W (Access)
۱۵.۵۱ W (HDD Hibernation)
  British Thermal Unit ۱۲۵.۲۱ BTU/hr (Access)
۵۲.۹۶ 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%
Operating Temperature ۰°C to 40°C (32°F to 104°F)
  Storage Temperature -۲۰°C to 60°C (-5°F to 140°F)
  Relative Humidity ۵% to 95% RH
  • FCC
  • CE
  • BSMI
  • EAC
  • CCC
  • KC
  • VCCI
  • RCM
۳-year hardware warranty, extendable to 5-year coverage – EW201
  Notes The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more)
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
  • Expansion Units: DX517
  • ۳.۵″ SATA HDD: HAT5300
  • ۲.۵″ SATA SSD: SAT5210
  • M.2 2280 NVMe SSD: SNV3410
  • VisualStation: VS360HD
  • Surveillance Device License Pack

Synology Assistant


Operating System(DSM)


Hardware Installation Guide




DiskStation DS1520+

۱۰-Reset button

۱۱-System fan

۱۲-Kensington Security Slot

۷-eSATA port

۸-Power port

۹-۱GbE RJ-45 port

۴-USB 3.0 port

۵-Power button and indicator

۶-Drive tray

۱-Status indicator

۲-Drive status indicator

۳-Drive tray lock