• Synology reserves the right to replace memory modules with the same or higher frequency based on supplier’s product life cycle status. Rest assured that the compatibility and stability have been strictly verified with the same benchmark to ensure identical 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.
• For more information about the recommended memory configurations, please check the Hardware Installation Guide of your Synology product.

• 3.5″ SATA HDD
• 2.5″ SATA HDD
• 2.5″ SATA SSD

• Synology only guarantees full functionality, reliability, and performance for Synology drives listed on the compatibility list. The use of non-validated components may limit certain functionality and result in data loss and system instability.
• “Compatible drive type” indicates drives that have been tested to be compatible with Synology products. This term does not indicate the maximum connection speed of each drive bay.

• This device’s 1GbE LAN ports have a maximum transmission unit (MTU) size of 1,500 bytes.
• The USB 3.0 standard was renamed to USB 3.2 Gen 1 by the USB Implementers Forum (USB-IF) in 2019.

• Btrfs
• EXT4

• Btrfs
• EXT4
• EXT3
• FAT
• NTFS
• HFS+
• exFAT

• Full-Speed Mode
• Cool Mode
• Quiet Mode

32.12 W (HDD Hibernation)

109.67 BTU/hr (HDD Hibernation)

• Power consumption is measured when it is fully loaded with Western Digital 1TB WD10EFRX hard drive(s).
• Noise Level Testing Environment: Fully loaded with Seagate 2TB ST2000VN000 hard drive(s) in the idle state. Two G.R.A.S. Type 40AE microphones, each set up 1 meter away from the Synology NAS at the front and rear. Background noise: 16.49-17.51 dB(A); Temperature: 24.25-25.75?C; Humidity: 58.2-61.8%

• FCC
• CE
• BSMI
• VCCI
• RCM
• UKCA
• EAC
• CCC
• KC
• UL

• Availability varies by region. Before purchasing, please visit the official web pages of EW201/202 and Extended Warranty Plus for a list of eligible regions.
• The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more)

• Main Unit X 1
• Accessory Pack X 1
• AC Power Cord X 1
• RJ-45 LAN Cable X 2
• Quick Installation Guide X 1

• DDR4 ECC SODIMM: D4ES02-4G/D4ES02-8G/D4ES01-16G
• Expansion Units: DX1222
• 3.5″ SATA HDD: HAT5300
• 2.5″ SATA SSD: SAT5210
• M.2 SSD & 10GbE Combo Adapter Card: E10M20-T1
• M.2 SSD Adapter Card: M2D20
• 25GbE Network Interface Card: E25G21-F2
• 10GbE Network Interface Card: E10G21-F2/E10G18-T2/E10G18-T1
• VisualStation: VS360HD
• Surveillance Device License Pack

• Synology Hybrid RAID
• Basic
• JBOD
• RAID 0
• RAID 1
• RAID 5
• RAID 6
• RAID 10

• Basic to RAID 1
• Basic to RAID 5
• RAID 1 to RAID 5
• RAID 5 to RAID 6

• Synology Hybrid RAID
• RAID 1
• RAID 5
• RAID 6
• RAID 10

• Synology Hybrid RAID
• JBOD
• RAID 5
• RAID 6

• Synology Hybrid RAID
• RAID 1
• RAID 5
• RAID 6
• RAID 10

• Usable capacity for each volume will be lower than the maximum volume size and is dependent on the filesystem and the amount of system metadata stored.
• Each internal volume (may consist of multiple drives) is expandable up to 108TB.

• Regarding data concerning tests with RAM expansion, all memory slots are installed with the maximum capacity of supported RAM.
• During testing, the maximum number of SSDs supported by this model is installed in a RAID 5 configuration.
• The testing standard was based on the maximum number of concurrent connections supported by this model. During the testing, 25% of the connections were used to transfer files concurrently. The transfer process guaranteed that the connections were not interrupted; the minimum transfer speed was not guaranteed.

• Google Chrome
• Firefox
• Microsoft Edge
• Safari

• Models with more than 4 bays were installed with two SSDs for SSD cache.
• For tested models with expandable memory, the maximum amount of RAM was installed.
• The performance of the mail system will slightly decrease in high-availability mode due to data synchronization between the two servers.
• Functions that were enabled in all of the tests above: anti-spam, anti-virus, DNSBL, greylist, content scan, full-text search (English only).

1050 FPS @ 1080p (1920×1080)

600 FPS @ 3M (2048×1536)

440 FPS @ 5M (2591×1944)

320 FPS @ 4K (3840×2160)

1200 FPS @ 1080p (1920×1080)

1120 FPS @ 3M (2048×1536)

600 FPS @ 5M (2591×1944)

480 FPS @ 4K (3840×2160)

• Maximum IP cameras and FPS figures are tested with the device fully populated with drives and under a continuous recording setup.
• Actual system capabilities may differ depending on system configuration, drive performance, number of features enabled, and if additional workloads are present.

• Exceeding the recommended numbers above will not block application operations, but may result in longer response time.
• Utilizing SSD cache can significantly improve performance.
• For tested models with expandable memory, the maximum amount of RAM was installed.
• Btrfs file system and non-encrypted shared folders were used during the aforementioned testing.

• Multiple files were opened for testing and each file was edited by 30 users simultaneously.
• For tested models with expandable memory, the maximum amount of RAM was installed.
• Client performance may affect maximum simultaneous editing users. Client PCs used for testing: Intel Core i3-3220 / 8GB RAM