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Storage expansion and accessories


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ActiveProtect appliance
RS18017xs+
To ensure compatibility with your system, please refer to the compatibility list and spare parts page.

Expansion units

Add extra drive bays to your storage with compatible expansion units. To find drives and accessories for expansion units, go to Expansion units.

FX2421

FX2421

24 bays
  • Designed for Synology FlashStation
  • Online volume expansion
  • Redundant power supply
RX6025sas

RX6025sas

60 bays
  • 60 x 3.5'' SAS HDD
  • Online storage expansion
  • Redundant power supply
RX1225RP

RX1225RP

12 bays
  • For 2.5” and 3.5” SATA drives
  • Online storage expansion
  • Redundant power supply
RX1223RP

RX1223RP

12 bays
  • For 2.5” and 3.5” SATA drives
  • Online storage expansion
  • Redundant power supply
RX1222sas

RX1222sas

12 bays
  • For 2.5” and 3.5” SAS/SATA drives
  • Online volume expansion
  • Redundant power supply
RXD1219sas

RXD1219sas

12 bays
  • For 2.5” and 3.5” SAS drives
  • Online volume expansion
  • Redundant power supply
RX1217RP

RX1217RP

12 bays
  • For 2.5” and 3.5” SATA drives
  • Online volume expansion
  • Redundant power supply (RP)
RX1217

RX1217

12 bays
  • For 2.5” and 3.5” SATA drives
  • Online volume expansion
  • Redundant power supply (RP)
RX418

RX418

4 bays
  • For 2.5” and 3.5” SATA drives
  • Online volume expansion
  • 12-inch depth chassis design
DX1222

DX1222

12 bays
  • For 2.5" and 3.5" SATA drives
  • Online volume expansion
  • 16.25 W in HDD Hibernation
DX1215II

DX1215II

12 bays
  • For 2.5” and 3.5” SATA drives
  • Online volume expansion
  • 21.71W in HDD Hibernation
DX525

DX525

5 bays
  • For 2.5" and 3.5" SATA drives
  • Online volume expansion
  • 7.0 W in HDD Hibernation
DX517

DX517

5 bays
  • For 2.5” and 3.5” SATA drives
  • Hot-swappable drive tray design
  • 2.4W in HDD Hibernation

Storage drives

Boost your storage systems with compatible Synology drives. For compatible drives via expansion unit, see here.

Plus Series 3.5" SATA HDD

Plus Series 3.5" SATA HDD

  • Made for 24/7 operation in multi-drive RAID
  • Enhanced heat and vibration tolerance
  • One-click drive firmware updates through DSM
Enterprise Series 3.5" SATA HDD

Enterprise Series 3.5" SATA HDD

  • Performance optimized for Synology systems
  • Enterprise-grade endurance and reliability
  • One-click drive firmware updates through DSM
Enterprise Series 3.5" SAS HDD

Enterprise Series 3.5" SAS HDD

  • Performance optimized for Synology SAS-compatible systems
  • Enterprise-grade endurance and reliability
  • One-click drive firmware updates through DSM
Enterprise Series 2.5" SATA SSD

Enterprise Series 2.5" SATA SSD

  • High sustained performance
  • Enterprise-grade endurance and reliability
  • One-click drive firmware updates through DSM
Enterprise Series M.2 NVMe SSD

Enterprise Series M.2 NVMe SSD

  • I/O performance boost
  • Enterprise-grade endurance and reliability
  • One-click drive firmware updates through DSM

Add-in cards

Tailor your system with add-in cards to meet your specific needs.

E10M20-T1

E10M20-T1

  • 1 x 10GBASE-T, 2.5/5GbE compliant
  • 2 x M.2 2280/22110 NVMe SSD slots
  • PCIe 3.0 x8
M2D20

M2D20

  • 2 x M.2 2280/22110 NVMe SSD slots
  • PCIe 3.0 x8
M2D18

M2D18

  • Support NVMe/SATA SSD
  • 2 x M.2 slots
  • 2242/2260/2280 compliant
E10G30-F2

E10G30-F2

  • Support 10Gbps
  • 2 x SFP+ ports
  • PCIe 3.0 x8
E25G30-F2

E25G30-F2

  • Supports 10/25Gbps
  • 2 x SFP28 ports
  • PCIe 3.0 x8
E10G30-T2

E10G30-T2

  • Support 10Gbps
  • 2 x RJ-45 ports
  • PCIe 3.0 x8
E10G22-T1-Mini

E10G22-T1-Mini

  • For devices with network upgrade slot
  • Support 10Gbps
  • 1 x RJ-45 port
E10G18-T1

E10G18-T1

  • Support 2.5/5/10Gbps
  • 1 x RJ-45 port
  • PCIe 3.0 x4

Memory modules

Increase your system's memory capacity with compatible RAM modules.

Synology DDR3 Memory Module

Synology DDR3 Memory Module

  • ECC or non-ECC
  • SODIMM or UDIMM
  • Memory sizes from 4 to 32 GB
Synology DDR4 Memory Module

Synology DDR4 Memory Module

  • ECC or non-ECC
  • RDIMM, SODIMM, or UDIMM
  • Memory sizes from 4 to 64 GB

Rail kits

Accessories for improved access and cable management.

Synology Rail Kit RKS-03

Synology Rail Kit RKS-03

  • Sliding rack rails for Synology rackmount servers
Synology Rail Kit RKS-02

Synology Rail Kit RKS-02

  • Sliding rack rails for Synology rackmount servers
Synology Rail Kit RKS-01

Synology Rail Kit RKS-01

  • Sliding rack rails for Synology rackmount servers
Synology Cable Management Arm CMA-01

Synology Cable Management Arm CMA-01

  • Cable management solution for Synology sliding rail kits

License packs & services

Find the right Synology licenses for your needs: features, cloud services, extended warranties, and more.

Surveillance Device License Pack

Surveillance Device License Pack

  • Manage extra cameras, I/O modules, intercoms, and other devices on Surveillance Station.
Synology MailPlus License Pack

Synology MailPlus License Pack

  • Add 5 or 20 extra active email accounts to your email server.
Virtual Machine Manager Pro

Virtual Machine Manager Pro

  • Take full advantage of VMM’s cluster infrastructure with flexible migration and scalability options.
Virtual DSM License

Virtual DSM License

  • Leverage High Availability, ultrafast snapshots, protection plans, and more in Virtual DSM instances.
Presto File Server License

Presto File Server License

  • Accelerate file transfers efficiently with the package that meets your bandwidth needs.
exFAT Access

exFAT Access

  • Access external storage devices mounting an exFAT file system on your Synology NAS/SAN.
Extended Warranty Plus

Extended Warranty Plus

  • Extend your warranty and complement it with direct and advanced replacement options.
C2 Storage for Hybrid Share

C2 Storage for Hybrid Share

  • Combine local performance and cloud scalability to share and sync files seamlessly.
C2 Storage for Hyper Backup

C2 Storage for Hyper Backup

  • Back up your Synology system data on a dedicated and secure cloud destination.
C2 Backup for Surveillance

C2 Backup for Surveillance

  • Keep crucial video recordings in case of server downtime with dual recording to the cloud.
Active Insight

Active Insight

  • Keep an eye on your deployment with cloud monitoring of performance, login activities, and backup task statuses.

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