• 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 SSD
• M.2 2280 NVMe SSD

• The hot swappable drive feature is not supported by M.2 SSD slots.
• "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

• For more information on how power consumption is measured, refer to this article.
• Noise testing was conducted with the Synology system fully installed with Synology SATA HDDs and in an idle state. Two GRAS 40AE microphones are placed at a 1 m distance from the front and rear of the device. 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

3-year hardware warranty, extendable to 5 years with Extended Warranty Plus

• 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 Adapter X 1
• AC Power Cord X 1
• RJ-45 LAN Cable X 2
• Quick Installation Guide X 1

• 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 (with Expansion Unit)

• Synology Hybrid RAID
• RAID 1
• RAID 5
• RAID 6 (with Expansion Unit)
• RAID 10 (with Expansion Unit)

• Creating M.2 storage pools requires the use of Synology-verified SSDs, which are rigorously tested under extreme temperature conditions. Thermal parameters for SSDs and NAS units are fine-tuned to ensure optimal management of thermal conditions under I/O-intensive environments. (Learn more)
• 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.
• Actual maximum storage pool and volume sizes vary depending on drives used, the number of drive bays available, and the RAID configuration.
• 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.
• 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

• Measured with simulated users, each with an average record of 20,000 messages, emojis, or stickers. The required server response time is below ten seconds.
• When applicable, tested systems are configured with maximum memory and set to allow the maximum number of connections.

• 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).

• 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