Synology DiskStation® DS425+

2.5GbE connectivity and diverse storage options

The DS425+ features built-in 2.5GbE networking and supports both SATA SSDs and HDDs in 2.5″/3.5″ internal bays, as well as M.2 NVMe drives via M.2 slots for use cache.^2,6

Extra protection with Extended Warranty Plus

Add an additional two years to your standard three-year limited hardware warranty¹¹ and gain access to premium services that accelerate recovery in the event of a disaster.¹²

Hardware Overview

Notes:

1. Gartner® and Peer Insights™ are trademarks of Gartner, Inc. and/or its affiliates. All rights reserved. Gartner Peer Insights content consists of the opinions of individual end users based on their own experiences, and should not be construed as statements of fact, nor do they represent the views of Gartner or its affiliates. Gartner does not endorse any vendor, product or service depicted in this content nor makes any warranties, expressed or implied, with respect to this content, about its accuracy or completeness, including any warranties of merchantability or fitness for a particular purpose.
2. Please consult our compatibility list before purchasing hard drives. For more details, please refer to this article.
3. Raw capacity calculated using 24 TB drives. Usable storage capacity may vary depending on drives used and RAID configuration.
4. Performance figures are obtained through internal testing by Synology. Actual performance may vary depending on the testing environment, usage, and configuration. See performance charts for more information.
5. This figure represents the recommended number of IP cameras operating at 1080p.
6. Synology Enterprise Series M.2 NVMe SSD drives can be installed through the built-in M.2 slots to enable SSD caching or create SSD storage pools. Drives are sold separately.
7. C2 Storage for Hyper Backup and Hybrid Share requires purchase of an eligible annual or monthly subscription. A free trial is available for each newly registered account. Learn more
8. Surveillance Station includes two free licenses. Connecting more cameras and devices requires additional licenses. Learn more.
9. C2 Backup for Surveillance requires purchase of an eligible annual subscription. Each additional channel requires a separate subscription. A free trial is available.
10. Synology Active Insight includes three free licenses. Additional licenses can be added with the purchase of an annual subscription.
11. Extended Warranty Plus must be purchased within 90 days of the device purchase date or, if none is available, 180 days of the device manufacturing date. A Synology Account is required for the purchase. The starting date of Extended Warranty Plus additional coverage is calculated based on the purchase date of your Synology NAS. If you cannot provide proof of purchase, the device manufacturing date applies.
12. Premium services including express shipping is a paid add-on available in select countries only.

Specifications

CPU
CPU Model	Intel Celeron J4125
CPU Quantity	1
CPU Cores	4
CPU Threads	4
CPU Architecture	64-bit
CPU Frequency	2.0 (base) / 2.7 (turbo) GHz
Hardware Encryption Engine	✓
Memory
System Memory	2 GB DDR4 non-ECC
Total Memory Slots	1
Maximum Memory Capacity	6 GB (2 GB + 4 GB)
Notes	Synology may revise pre-installed memory module specifications in response to component lifecycle and supply conditions. All revised components undergo the same rigorous validation to ensure equivalent compatibility, stability, and 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	4
M.2 Drive Slots	2 (NVMe)
Drive Type (See all supported drives)	3.5″ SATA HDD 2.5″ SATA SSD M.2 2280 NVMe SSD
Hot Swappable Drive*	✓
Notes	The hot swappable drive feature is not supported by M.2 SSD slots.Synology only guarantees full functionality, reliability, and performance for compatible drives. Please consult our compatibility list before purchasing hard drives. For more details, please refer to this article.
External Ports
RJ-45 1GbE LAN Port	1
RJ-45 2.5GbE LAN Port	1
USB 3.2 Gen 1 Port	2
Notes	MTU value of 1GbE LAN port has a limit of 1500.
Appearance
Size (Height x Width x Depth)	166 mm × 199 mm × 223 mm
Weight	2.18 kg
Others
System Fan	92 mm × 92 mm × 2 pcs
Fan Speed Mode	Full-Speed ModeCool ModeQuiet Mode
Brightness Adjustable Front LED Indicators	✓
Power Recovery	✓
Noise Level*	21.6 dB(A)
Scheduled Power On / Off	✓
Wake on LAN / WAN	✓
Power Supply Unit / Adapter	90 watts
AC Input Power Voltage	100V to 240V AC
Power Frequency	50/60 Hz, Single Phase
Power Consumption	28.25 watts (Access) 6.10 watts (HDD Hibernation)
British Thermal Unit	96.33 BTU/hr (Access) 20.79 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 SSDs and in an idle state. Two G.R.A.S. type 40AE microphones were 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)
Operating Humidity	8% to 80% RH
Storage Humidity	5% to 95% RH
Warranty	3-year hardware warranty, extendable to 5 years with Extended Warranty Plus
Notes	The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more)Extended Warranty Plus is only available in Europe and North America. Refer to the Extended Warranty Plus website for details on supported countries/regions. (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
Optional Accessories	DDR4 non-ECC SODIMM: D4NS01-4G Enterprise Series 3.5″ SATA HDD: HAT5300 Series Plus Series 3.5″ SATA HDD: HAT3300 Series Enterprise Series 2.5″ SATA SSD: SAT5200 Series Enterprise Series M.2 2280 NVMe SSD: SNV3400 & SNV5400 Series

Notes:

1. Model specifications are subject to change without prior notice.
2. The figures are based on Synology internal testing. Each performance test is done individually. No other services or applications are processed at the same time.
3. The actual performance may be lower than lab testing figure due to differences in server configuration, deployment, and the number of active operations.
4. If usage requirements exceed the specifications above, please contact our regional partners for professional advice.