Description & Specifications
Compact data storage for home & edge
- Up to 40 TB raw (2 × 20 TB drives)
- 2.5GbE + 1GbE for faster networking
- ~282/217 MB/s sequential read/write4
- Centralized backup, private cloud, and surveillance (up to 25 cams)5
Key Features
- Private Cloud: Store, sync, and share across devices with versioning and quick rollback.
- Photos & Media: Organize, auto-album, and share securely with Synology Photos.
- Collaboration: Synology Drive, Office, MailPlus, Calendar, and Chat for teams.
- Multi-Site Sync: Keep folders up to date across offices with Drive ShareSync / Hybrid Share.
- Backup Suite: Protect PCs, servers, VMs, M365/Google Workspace with Active Backup & Hyper Backup.
- Surveillance: Manage up to 25× 1080p IP cameras with Surveillance Station (2 licenses included)7.
Hardware Specifications
Processor & Memory
| CPU | Intel Celeron J4125, 4-core, 64-bit, 2.0/2.7 GHz |
|---|---|
| Hardware Encryption | Yes |
| System Memory | 2 GB DDR4 non-ECC (1 slot) |
| Max Memory | 6 GB (2 GB + 4 GB)* |
Storage
| Drive Bays | 2 |
|---|---|
| Drive Types | 3.5" SATA HDD; 2.5" SATA SSD |
| Raw Capacity | Up to 40 TB (2 × 20 TB)2,3 |
Connectivity
| LAN | 1 × 2.5GbE RJ-45, 1 × 1GbE RJ-45 (MTU on 1GbE limited to 1500) |
|---|---|
| USB | 2 × USB 3.2 Gen 1 |
Performance
| Sequential R/W | Up to ~282/217 MB/s4 |
|---|---|
| Surveillance | Recommended up to 25 × 1080p IP cameras5 |
Physical
| Dimensions (H × W × D) | 165 × 108 × 232.2 mm |
|---|---|
| Weight | 1.3 kg |
| System Fan | 92 mm × 92 mm × 1 |
| Noise Level | 19.6 dB(A)* |
Power
| Adapter | 60 W |
|---|---|
| Input | 100–240 V AC, 50/60 Hz |
| Consumption | 16.98 W (Access), 6.08 W (HDD Hibernation) |
| BTU | 57.90 BTU/hr (Access), 20.73 BTU/hr (HDD Hibernation) |
Other
| LED | Adjustable brightness |
|---|---|
| Power Recovery | Supported |
| WoL/WoWAN | Supported |
| Certifications | FCC, CE, BSMI, VCCI, RCM, UKCA, EAC, CCC, KC, BIS |
| Warranty | 3 years (extendable to 5 years with EW201)10 |
In the Box
- DS225+ Main Unit × 1
- Accessory Pack × 1
- AC Power Adapter × 1
- AC Power Cord × 1
- RJ-45 LAN Cable × 2
Optional Accessories
- DDR4 non-ECC SODIMM: D4NS01-4G
- Enterprise HDD: HAT5300 Series
- Plus HDD: HAT3300 Series
- Enterprise SATA SSD: SAT5200 Series
Notes
- “Trusted by professionals” refers to Synology’s enterprise adoption.
- Compatible drives are mandatory; check the official compatibility list before purchase.
- Raw capacity is calculated with 20 TB drives; usable capacity varies by RAID/filesystem.
- Performance based on Synology internal testing; results vary by environment/configuration.
- Recommended camera count at 1080p; additional Surveillance Station licenses required beyond 2.7
- Some cloud features (C2/Hybrid Share) require separate subscriptions.
- Two Surveillance Station device licenses included; more require licenses.
- Active Insight includes 3 free licenses; expand via subscription.
- Warranty terms and coverage vary by region and purchase date.
- * Noise level measured under specific lab conditions; results vary.
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