When performance meets styleDS620slim is a mini 6-bay NAS with a stylish chassis design, perfectly blending in modern workplaces or apartments. Supporting near-instantaneous snapshot technology, DS620slim is an all-around file management solution that fulfills professionals’ needs of advanced data protection. CPUDual-core 2GHz burst up to 2.5GHz MemoryDDR3L 2GB, up to 6GB Encryption PerformanceOver 226 MB/s reading and 198 MB/s writing Remain classic while shrinking footprintThe mini 6-bay design keeps DS620slim classic and saves deployment space. With six 2.5" drive support, DS620slim is able to boost performance by installing SSDs.
Btrfs: Next generation storage efficiencyThe Btrfs file system introduces cutting-edge storage technologies and optimized snapshots to prevent data corruption and reduce maintenance overhead. While ensuring high-level data integrity, it also offers flexible, efficient data protection and recovery tools.   Flexible Shared Folder/User Quota System provides comprehensive quota control on all user accounts and shared folders Snapshot Replication provides schedulable and storage capacity-saving data protection with 1,024 shared folder backups and 65,000 system-wide snapshots File or folder level data restoration makes data recovery fast and flexible Automatic file self-healing detects and recovers corrupted files without user interventionUltimate file management and sharingFile Station is a web-based, fast and secure management tool built to allow easy, drag-and-drop operations without requiring any complex setup on Mac or PC. Advanced search and filtering tools allow for easy organization and file sharing. For complete compatibility, DS620slim supports the following protocols: AFP, FTP, iSCSI, NFS, SMB, and WebDAV.  Access and sync your files seamlesslySynology Drive provides a built-in universal portal to access your data anytime and anywhere, and synchronize all your files across platforms, including Windows, macOS, Linux, Android, and iOS. Sync files on demand: Save the storage space and network bandwidth of your PC. Go back in time: Easily retrieve previous versions of your shared files. Back up your data: Protect your files with scheduled backups or in real-time. Stream content to your TVTurn your Synology NAS into a home media hub and stream your digital contents to computers, mobile devices, Samsung TV, Apple TV, Google Chromecast, and DLNA devices.  |
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DSM Specifications
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| Maximum Single Volume Size | 108 TB | |
| Maximum Internal Volume Number | 64 | |
| SSD Read/Write Cache (Determining cache size) | ||
| SSD TRIM | ||
| Supported RAID Type |
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| RAID Migration |
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| Volume Expansion with Larger HDDs |
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| Volume Expansion by Adding a HDD |
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| Global Hot Spare Supported RAID Type |
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| Notes |
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| Internal Drives |
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| External Drives |
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| Notes | exFAT Access can be installed for free from Package Center in DSM 7.0. In DSM 6.2 or earlier versions, exFAT Access needs to be purchased in Package Center. | |
| File Protocol |
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| Maximum Concurrent SMB/AFP/FTP Connections | 500 | |
| Maximum Concurrent SMB/AFP/FTP Connections (with RAM expansion) | 1,500 | |
| Windows Access Control List (ACL) Integration | ||
| NFS Kerberos Authentication | ||
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| Maximum Local User Accounts | 2,048 | |
| Maximum Local Groups | 256 | |
| Maximum Shared Folder | 256 | |
| Maximum Shared Folder Sync Tasks | 8 | |
| Maximum Hybrid Share Folders | 10 | |
| Folder and Package Backup | ||
| Entire System Backup | ||
| Notes | Full-system backup requires DSM 7.2 or later. | |
| Synology High Availability | ||
| Syslog Events per Second | 800 | |
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Virtualization
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VMware ESXi 6.5 and VAAI | |
| Windows Server 2016 | ||
| Windows Server 2019 | ||
| Citrix Ready | ||
| OpenStack | ||
| Supported Protocols | SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV | |
| Supported Browsers |
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| Supported Language | English, Deutsch, Français, Italiano, Español, Dansk, Norsk, Svenska, Nederlands, Русский, Polski, Magyar, Português do Brasil, Português Europeu, Türkçe, Český, ภาษาไทย, 日本語, 한국어, 繁體中文, 简体中文 | |
| Notes | For an updated list of supported browser versions, check the DSM Technical Specifications. | |
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Add-on Packages view the complete package list
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| Suggested Users | 1,000 | |
| Notes | Models with expandable memory are tested with their maximum supported memory. | |
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Download Station
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Maximum Concurrent Download Tasks | 80 |
| Maximum iSCSI Target Number | 128 | |
| Maximum LUN | 256 | |
| LUN Clone/Snapshot, Windows ODX | ||
| Notes | iSCSI Manager has been renamed to SAN Manager in DSM 7.0. | |
| Free Email Accounts | 5 (Additional accounts require purchase of licenses) | |
| Suggested Users | 250 | |
| Maximum Server Performance | 181,000 emails per day, approx. 5.5GB | |
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| DLNA Compliance | ||
| Facial Recognition | ||
| Object Recognition | ||
| Notes | Object recognition requires an upgrade of memory capacity to a minimum of 4 GB. | |
| Maximum Snapshots per Shared Folder | 1,024 | |
| Maximum of System Snapshots | 65,536 | |
| Default Licenses | 2 (Additional cameras require purchase of licenses) | |
| Suggested Maximum IP Cameras and Total FPS (H.264) |
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| Suggested Maximum IP Cameras and Total FPS (H.265) |
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| Notes |
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| Recommended Number of Concurrent Sync Clients | 450 (the number of connections that can be maintained when the recommended number of hosted files was reached) | |
| Recommended Number of Hosted Files | 5,000,000 (applies to files indexed or hosted by Synology Drive. For file access through other standard protocols, refer to the File Services section above) | |
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| Suggested Users | 1,500 | |
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| Recommended Virtual Machine Instances | 2 (Learn more) | |
| Recommended Virtual DSM Number (Licenses required) | 2 (including 1 Free License) | |
| Notes | The specifications vary depending on system configuration and memory size. | |
| Maximum Connections | 40 | |
| NAS | |
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| Compatible Drive Type | 2.5 |
| CPU Architecture | 64-bit |
| CPU Core | 2 |
| CPU Frequency | 2.0 (base) / 2.5 (turbo) GHz |
| CPU Model | Intel Celeron J3355 |
| CPU Quantity | 1 |
| Drive Bays | 6 |
| Hardware Encryption Engine | YES |
| Hot Swappable Drive | YES |
| Maximum Memory Capacity | 6 GB (2 GB + 4 GB) |
| Memory | 2 GB DDR3 non-ECC SODIMM |
| Power Supply Unit / Adapter | 65 watts 100V to 240V AC 50/60 Hz, Single Phase |
| RJ-45 1GbE LAN Port | 2 |
| System Fan | 80 mm x 80 mm x 1 pcs |
| Total Memory Slots | 2 |
| USB 3.2 Gen 1 Port | 2 |
