4-bay expansion unit / For rack use


When the storage capacity of Synology 1U RackStation reaches its limit, The Synology RX418 Expansion Unit provides easy expansion by adding four 3.5”/2.5” SATA drives to the system. Synology RX418 can also be used as a dedicated local backup destination of Synology 1U RackStation for comprehensive data protection.
- Plug-and-play design for hassle-free expansion of storage space
- Online volume expansion
- 30 cm depth to fit in 2-seater racks and wall-mount racks
- Saving energy with long sleep
- Managed from Synology DiskStation Manager (DSM)
Compatible with:
- RS815
- RS818
- RS815PLUS
- RS815RPPLUS
- RS818PLUS
- RS818RPPLUS
- Power: 100 to 240VAC.
- Consumption: 23.26W.
- Operating temperature: 5 to 35 °C.
- Dimensions: 44 X 480 X 325 mm.
- Weight: 4.28Kg.
- eSATA port x1
Ultimate backup solution
RS822PLUSintegrates multiple backup applications into one intuitive user interface, with durable storage technologies to protect your valuable data on any device.
Activate Backup for Business
Active Backup for Business centralizes backup tasks for VMware, Windows, Microsoft 365 and Google Workspace, so you can manage these backups on Synology NAS from a simple console.
Hyper Backup
Back up your data completely to a local shared folder, an external device, another Synology NAS, an Rsync server or a public cloud to ensure data security.
Synology Drive
Protect your computer with Synology Drive Client. Back up data in real time and recover files at a point in time effortlessly.
Surveillance Station
- Protect your company, your home and other environments with the Surveillance Station system that is reliable and intuitive, It also offers intelligent video monitoring and management tools to protect your valuable assets.
- The RS822PLUS NAS supports up to 40 5MP (8 IPS) cameras
Check compatibility with IP cameras

Next generation file system
The Btrfs file system features advanced storage technologies and optimized captures to prevent data corruption and reduce maintenance operating costs. While ensuring high-level data integrity, offers flexible and effective data protection and recovery tools.
Real-time collaboration in the private cloud
- Synology Office is a collaboration package that combines the convenience and ease of use of public cloud services with the data privacy and security offered by private cloud. It allows you to work more fluidly and together on documents and calculation hours in a protected environment.
In addition to being able to integrate the Synology chat solution during the editing of these documents and for greater security of your files, you can have multiple versions to be able to recover to previous versions with just one click.

Powered by Synology DiskStation Manager
Surveillance Station
Complete surveillance solution for recording, supervision and administration.
Synology office
Real-time collaboration on documents, spreadsheets and slides to increase team productivity.
Synology High Availability
Easy transition between clustered servers in the event of server failure to minimize impact on applications.
DSM User Interface
Award-winning operating system that features an intuitive user interface and powerful features.
Security
Protect your data with comprehensive built-in security tools to defend your devices against constant threats.
All in one server
Save additional investments by integrating multiple network services, internet or email and management applications for your NAS.

