Go to the Synology Warranty Check Page
Navigate to "Products" or "My Devices" . synology warranty check
Find your NAS in the list. The warranty expiration date will be displayed next to the serial number. If you don't see it: Click "Register a new product" and enter the serial number. Once registered, the correct warranty date (based on your invoice or manufacturing date) will appear. Method 3: Check via DSM (DiskStation Manager) You can find your serial number directly in the operating system, but you cannot see the expiration date here. Go to the Synology Warranty Check Page Navigate