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Made by Synology
The Synology DS1821+ is an 8-bay desktop NAS with an AMD Ryzen quad-core processor, two M.2 NVMe SSD cache slots, and expandability to 24 drives with DX517 expansion units. It features quad 1GbE ports, an optional 10GbE or 25GbE add-in card, and runs DiskStation Manager for enterprise-grade file management, backup, and virtualization.
Product released: January 1, 2021
Version 7.4-90075, released June 16, 2026
Verified by LatestUpdate: June 18, 2026
Important Note After installing this update, you will not be able to downgrade to a previous DSM version. This update will restart your Synology NAS. If auto update does not run, perform a manual update in Control Panel. Before updating, follow the instructions and complete the required actions to ensure success. To uphold our commitment to quality, every DSM release undergoes rigorous validation. To ensure optimal stability, the models listed below will not receive this update on your device and will remain on their most suitable version. You can only download the upgrade patch from Synology Download Center because you won't receive notifications for this update on your DSM. FS Series: FS3017, FS2017, FS1018 XS Series: RS18016xs+, RS4017xs+, RS3617xs+, RS3617xs, RS3617RPxs, RS18017xs+, DS3617xs, DS3617xsII, DS3018xs Plus Series: RS2416RP+, RS2416+, DS916+, DS716+II, DS716+, DS216+II, DS216+, DS1817+, DS1517+, RS2818RP+, RS2418RP+, RS2418+, RS818RP+, RS818+, DS1618+, DS918+,...
This product was recently updated. The next firmware update is expected between July 4, 2026 and September 6, 2026.
Synology typically releases firmware updates for this product approximately every 49 days.
Official Synology DS1821+ product page
The Synology DS1821+ is an 8-bay desktop NAS with an AMD Ryzen quad-core processor, two M.2 NVMe SSD cache slots, and expandability to 24 drives with DX517 expansion units. It features quad 1GbE ports, an optional 10GbE or 25GbE add-in card, and runs DiskStation Manager for enterprise-grade file management, backup, and virtualization. It was originally released on January 1, 2021.
The latest firmware version for the Synology DS1821+ is 7.4-90075. It was released on June 16, 2026.
Synology DS1821+ firmware version 7.4-90075 includes the following changes: Important Note After installing this update, you will not be able to downgrade to a previous DSM version. This update will restart your Synology NAS. If auto update does not run, perform a manual update in Control Panel. Before updating, follow the instructions and complete the required actions to ensure success. To uphold our commitment to quality, every DSM release undergoes rigorous validation. To ensure optimal stability, the models listed below will not receive this update on your de...
To update the Synology DS1821+ firmware, download the latest version (7.4-90075) from Synology's website. Follow Synology's installation instructions, which typically involve copying the firmware file to a memory card or connecting via USB. Visit the official Synology product page for download instructions.
You can track Synology DS1821+ firmware updates automatically on LatestUpdate.io. We monitor Synology's releases and notify you when new firmware versions are available, so you never miss an update.
We have tracked 15 firmware versions for the Synology DS1821+. Based on historical patterns, updates are released approximately every 49 days. Synology releases updates to fix bugs, improve performance, and add new features. Track this product on LatestUpdate.io to be notified of future releases.
The Synology DS1821+ was recently updated. Based on this product's update history, the next firmware update is expected between July 4, 2026 and September 6, 2026.
Yes, the Synology DS1821+ received a firmware update within the last month. The most recent version is 7.4-90075.
The Synology DS1821+ is manufactured by Synology. Visit the official product page for more information.