Business File Server

To collaborate and share files across teams or locations while also considering data governance and privacy, Synology combines the flexibility of the cloud with control of on-premises file services.

Next generation file service in hand

Less hassle for your IT team

A solution to mitigating maintenance efforts and costs

  • Keep control of the storage capacity of shared folders by configuring user quota.
  • System operations are well logged with the visual display of historical logs and advanced search engine to quickly identify an event.
  • Save time by letting employees recover accidentally deleted files by themselves with built-in snapshot technology and file versioning.
  • Install Directory Server for Windows Domain and turn your NAS into a mixture of file and directory server.

Team up & share

Configure quota and privilege settings for Team Folder to better manage storage capacity for departments, and create sharing links in a few clicks with password and expiration date protection.

  • Sync and share files across individual sites, so employees can focus on delivering the best results. Learn more
  • Index all the files in NAS and search with ease.
  • Collaborate with colleagues and partners with Document, Spreadsheet, and Slides. Learn more

Mission-critical backup for business data

There’s no harm in having one more copy

  • Create a High Availability cluster to avoid unexpected service disruptions. Learn more
  • Easily encrypt and back up data to a remote location, such as another Synology NAS, file server, or even the public cloud service of your choice. Learn more
  • In businesses where maintaining 24/7 service is paramount, advanced security measures are provided to safeguard your data. Learn more

Customer stories

See how these organizations achieved more with Synology.

Synology was the best option as it was not only stable but also cost-effective.

Synology enables simple data delivery via network system, which brings about convenient utilization and more flexibility of back-end system management.

In just one package, we were able to meet our performance and HIPAA compliance requirements.

Synology was the best option as it was not only stable but also cost-effective.

Krys Group Learn more

Synology enables simple data delivery via network system, which brings about convenient utilization and more flexibility of back-end system management.

New Taipei City Learn more

In just one package, we were able to meet our performance and HIPAA compliance requirements.

Heartland Dental Learn more

Get started

Storage Management

  • Supported raw capacity with expansion units: up to 1344 TB with RS18017xs+
  • Support up to 512 shared folders*
  • Synology Hybrid RAID, Basic, JBOD, RAID 0, RAID 1, RAID 5, RAID 6, RAID 10, RAID F1 (Please check RAID calculator for the supported models of different RAID types)
  • Global Hot Spare for RAID 1, RAID 5, RAID 6, RAID 10, RAID F1 and SHR (check the availability on product comparison page)
  • Supports scheduling Data Scrubbing for RAID 5, RAID 6, RAID F1, SHR (composed of three or more disks), and BTRFS volume
  • Supports single volume or multiple volumes on RAID
  • Supports RAID Group (check the compatibility on product comparison page)
  • File system for internal disks: ext4, Btrfs (check the availability on our product comparison page)
  • File system for external disks: ext4, ext3, FAT, NTFS, Btrfs, exFAT and HFS+ (check the availability on our product comparison page)
  • HDD Hibernation
  • Scheduled S.M.A.R.T. tests
  • Dynamic Bad Sector Mapping
  • SSD cache support (check the availability here)
    • Requires 2 SSDs teamed for read-write caching

Btrfs File System

  • Set usage/user quota for shared folders
  • Enable file self-healing to automatically detect silent data corruption, and to recover silent data error on RAID disks (RAID 1, RAID 5, RAID 6, RAID 10 and RAID F1)
  • Enable file compression to increase the flexibility of volume usage
  • Perform defragmentation on a volume to increase system performance
  • Supports shared folder snapshots and replications
  • Supports instants SMB server-side copy
  • Supports browsing read-only snapshots
  • Supports Windows Previous Versions feature
  • Supports NFS version 2, 3, 4, and 4.1 protocol
  • Supports NFS 4.1 multipathing


  • For more information on the applied Synology NAS models of the Btrfs file system, please refer to here.

Directory Service

  • Supported local user accounts: up to 16,000 with RS18017xs+
  • Supported local user groups: up to 512 with RS18017xs+
  • Provider-consumer architecture
  • Password strength rules for LDAP users
  • Active Directory
    • Trusted Domain Support
  • LDAP Server
    • Google Apps Single Sign-On Integration
  • LDAP client
    • OpenLDAP
    • IBM domino
    • Customized Profile

Apps supporting LDAP/AD users

  • SMB
  • FTP
  • WebDAV
  • File Station
  • Network Backup
  • Cloud Station
  • Cloud Sync
  • Audio Station
  • Video Station
  • Mail Service
  • Surveillance Station
  • Personal Web Station
  • Photo Station
  • VPN Server
  • Note Station
  • Drive
  • Moments

System Requirements

  • Windows Domain: Windows Server 2003 Active Directory or later
  • LDAP server: LDAP standard version 3 (RFC2251)

Directory Server for Windows Domain

  • Support for Windows RSAT
  • Support for TLS domain controller certification
  • Support for custom NetBIOS domain names
  • DNS auto registration
  • Support for single domain controllers

Account & Privileges

  • Group membership and policies
  • Roaming user profiles
  • Account single sign-on
  • Home folder support

Security & Access Control

  • Kerberos-based authentication
  • Password reset via email
  • Password strength policies
  • Account lockout policies

Domain Clients

  • Microsoft Windows 7 and above
  • Linux



  • Recommended number of hosted files: up to 5,000,000*
  • Recommended number of concurrent connections for PC clients: up to 2,000*

File management

  • Supports accessing and managing files via web browsers, desktop clients, and mobile platforms
  • Supports creating folders and adding files of any types from the local end and Synology NAS
  • Supports managing files with folders, labels and stars
  • Supports moving and copying items to a different location including Team Folders and folders shared by others
  • Supports sorting items by title, modified time, type, owner and size
  • Supports various view modes including list view, detail view, thumbnail view and tile view
  • Supports various hotkeys for efficient file management
  • Supports searching for files using various criteria including keyword, location, type, owner, labels, size and date
  • Customizable permission settings for folders and files to be set as private, internal or public
  • Supports advanced protection links to add password and validity period for public file sharing
  • The viewing, editing and managing permission can be customized for each account
  • Supports Team Folder, which any account with permission can access directly without extra sharing settings required
  • Support grasping major updates via notifications
  • Supports operation logs and log export
  • Supports downloading and restoring historical versions of file
  • Link any folder to Synology Chat channels to notify users of important updates
  • Administrators can set up user’s My Drive and Team Folder from the Drive admin console
  • Administrators can restrict non-admin users’ privilege to share files publicly or with specific accounts


  • Supports syncing files and folders between PCs and Synology Drive with Drive PC Client
  • All files in My Drive, Team Folder, and Shared with me can be synced to users’ desktop
  • Administrators can configure different sync profiles for each user to limit the file size and types that can be synced
  • Provides client lists for viewing connected devices


  • Keeps up to 32 historical file versions with incremental data
  • Folder-level restoration with timeline navigation is supported for administrators in Drive Admin Console
  • Administrators can adjust content indexing service’s scope for Drive folders
  • Administrators can customize the maximum number of file versions for each Team Folder or user’s My Drive
  • Administrators can disable the versioning function


  • Synology documents, spreadsheets and slides can be created in Synology Drive by installing the add-on package, Synology Office 3.0
  • Images and videos in Synology Moments can be managed using Synology Drive
  • Supports backing up the Drive package via Hyper Backup

Drive PC client

  • Drive PC Client is supported on Windows, Mac, and Ubuntu
  • Supports creating connections and syncing with multiple Drive servers
  • Supports syncing files and folders shared by other users
  • Supports double clicking on the tray menu to open files of any event in web browsers
  • Supports single clicking on the tray menu to open containing folders
  • Supports creating sharing links and advanced protection links for synchronized files
  • Provides minimalist tray icons
  • Open Drive in web browsers from the system tray 
  • Supports instant pausing or deleting of established connections
  • Supports filtering event and notification logs by server
  • Notified files can be opened in containing folders or synced from the corresponding notification logs
  • Icon overlays can be enabled or disabled according to user settings
  • Customizable notification settings
  • Context menu in local file browsers for adjusting sync settings or creating sharing links
  • Customizable permission settings for sharing links to be set as public/internal and edit/view-only
  • Supports proxy connections


  • Local snapshots of shared folders on Btrfs file system and advanced file LUNs
  • Schedule snapshot and customize retention rules
  • Remove or lock versions
  • Browse and restore snapshots in the #snapshot folder in all file services or File Station
  • View snapshot data in the Previous Versions tab in the Properties dialogue on Windows PC.
  • Support up to 1,024 snapshots per shared folder*
  • Support up to 256 snapshots per iSCSI LUN*


  • Replicate data to another destination by taking and sending snapshots to local or another server. The maximum number of replication tasks is determined by different modules of Synology NAS. For more information, please go to Synology's official website
  • Schedule replication and customize retention rules
  • Send the initial replication copy via the Internet or storage devices
  • Replicate data to multiple destination servers from the same source server
  • Statistics of transferred size and sync duration are recorded and displayed as a report
  • Overview topology of data replication
  • Supports port forwarding by customizing address and port of a replication task
  • Encrypt replication transmission
  • iSCSI LUN replication can be managed via Synology Snapshot Replication or VMware vCenter Site Recovery Manager. (Installing Synology SRA on VMware Site Recovery Manager servers is required.)
  • Pause/resume replication transmission to optimize bandwidth


  • Restore to a previous version via various methods including common protocols, File Station, and Windows File Explorer.
  • Perform a failover on shared folders or iSCSI LUNs and make the replicas on the destination server writable when the source server is not healthy
  • Perform a re-protect action to sync data on the two servers again after performing a failover
  • Perform a test failover to make a clone and run all necessary tests in the event of disaster
  • Perform a force failover when the source server is healthy

High Availability Manager

  • Form a high-availability cluster with two identical Synology NAS servers in order to maximize service uptime
  • Automatic unexpected failover on CIFS/iSCSI/FTP/AFP/NFS service failure; power outage; storage space crash; data network disconnection
  • Supports Quorum Server to effectively minimize the occurrence of split-brain
  • VLAN support
  • After creating a cluster with Synology High Availability, the max number of volumes and block-level iSCSI LUNs altogether will be limited to 64
  • View recent system information, iSCSI Target connection history and file difference in each shared folder when a split-brain error occurs
  • Comprehensive management interface and easy-to-follow troubleshooting


  • High Availability does not support DHCP Server, MailPlus Server, Peta Space and Virtual Machine Manager


Security Advisor

  • Malware Detection and removal
  • Account and password, network-related, System-related security scan
  • DSM and packages version check

Firewall & Traffic Control

  • Allow/deny access to selected ports or services for specific IP addresses
  • Create firewall rules based on geographic region
  • Organize firewall rules into different firewall profiles
  • Traffic Control according to services and TCP/UDP ports
  • DDoS protection
  • VPN pass-through

AntiVirus Essential

  • AntiVirus Essential powered by ClamAV scanning engine
  • Full system scan
  • Scheduled scan
  • White List to exclude files from being scanned
  • Automatic update of virus definitions

AntiVirus by McAfee

  • Full system scan
  • Scheduled scan
  • White List to exclude files from being scanned
  • Automatic update of virus definitions
  • Available on specific models only. Please see this product comparison page to learn more

Auto Block

  • Block after specified number of attempts
  • Custom expiration time
  • Black and White List

DSM SSO Client

  • Supports Synology SSO Server
  • Supports OpenID Connect SSO Servers:
    • Azure
    • Websphere

Certificate Management

  • Supports the import and management of multiple certificates
  • Certificate encryption algorithm only supports RSA (ECC algorithm is not supported)
  • Supports multiple certificates for different services:
    • Web Apps (HTTPS) and WebDAV
    • Mail Services
    • RADIUS Server
    • VPN Server
  • Supports the creation and auto-renew of Let’s Encrypt certificate

TLS/SSL Profile Level Management

  • Supports multiple TLS/SSL Profile Level for different services:
    • Web Apps (HTTPS) and WebDAV
    • Mail Services
    • RADIUS Server
    • VPN Server

2-step verification

  • Time-based One-Time Password (TOTP) protocol
  • 2-step verification enforcement for admin groups or all users
  • Manage trusted devices

Log Center

  • Receive up to 3,000 syslog events per second*
  • Historical log activity chart
  • Archiving logs by specified time, number of logs, the data size, and different hosts
  • Download archives as HTML or CSV files
  • Proactive email notification according to log severity or specified keywords
  • Customize log transferring protocol
  • Customized log formats
  • Advanced log search engine
  • SSL connection
  • Log rotation: 1 month, 3 months, 6 months, 1 year

Presto File Server

  • User account with admin privilege is required for accessing Presto File Server on DSM
  • Supports TLS and AES-128 encrypted file transfers
  • Forced encryption on all login credentials
  • Supports IPv6
  • Supports 2-step verification
  • Provides real-time monitoring of all transfer status on the Overview section
  • Supports kicking specific clients that are connected to the server
  • System logs and transfer logs can be exported
  • Daily, weekly, monthly, and annual usage reports can be generated in HTML format
  • Reports can be generated according to set schedules and sent to designated email addresses
  • Allows servers to configure the total inbound and outbound traffic generated from all the connected clients
  • Supports in-app purchase of licenses or activating a 30-day free trial on Presto File Server
  • Supports centralized management to compress and encrypt all file transfers
  • Supports centralized management to set the maximum inbound and outbound traffic shared among all the clients connected to the server
  • Supports anonymous login
  • Supports usage through command-line interface
  • Sends an email notification if a client is disconnected from the server for more than 14 days 
  • Supports multiple filename conflict policies, allowing transferred files to be overwritten, skipped, or renamed when filename conflicts occur.
  • Supports automatically migrating license keys when a license is migrated to another clustered machine. 
  • Supports downloading files and client installers for all the supported platforms directly from Presto File Server.
  • Launched Presto Automator, which is a scheduling service feature powered by Synology Internet Transfer Accelerator (SITA).


  1. Please note that the figures marked in asterisks are derived from the Synology lab by using high-performance client computers with optimized network settings, and could vary in different environments.