Yes, the WD Red Plus 4TB is compatible with the Synology DS225+. It fits into the 2 hard drive bays for empty NAS enclosures and supports RAID 0, 1 or JBOD. Check the official Synology compatibility list for the latest firmware.
No, this NAS is neither hardware nor software compatible with the Seagate IronWolf Pro 20TB. On new DSx25+ models like this one, Synology restricts use to its own-brand drives; tests confirm that IronWolf Pro drives are rejected, preventing the creation of volumes. The official compatibility list is currently empty for third-party drives. For more certainty, consult the Synology community.
Yes, you can use the WD Red Pro 2 x 4TB HDDs in this model as it is compatible with 3.5" SATA HDDs. Synology recommends its own hard drives for optimal performance, but WD Red Pro works fine even if they are not officially certified. The device is open to other manufacturers as long as it fulfils the SATA standard.
The 2×8 TB variant is supplied equipped with HAT3320 (8 TB). [Product database Synology compatibility list]
Addition: The official Synology compatibility list mentions HAT3320-8T for the device, therefore HAT3310-8T is not listed as specified in the bundle.
No, no network cable is included in the scope of delivery. The NAS does not support a WLAN connection and must be wired via the RJ45 network ports (1x 2.5 Gigabit, 1x Gigabit).
Hello ramonbaertschi
During the initial setup, the NAS goes online and gets the latest DSM. The one with the old HDD compatibility, just like before. Then you can set up your RAID with WD or other brands.
Greetings
The product now supports third-party hard drives, including Seagate IronWolf Pro, with the DiskStation Manager (DSM) 7.3 update restoring compatibility and key features for such drives. This update reverses the previous restriction that limited full functionality to Synology-branded drives only.
Initially, the 2025 series NAS models required drives from Synology’s official compatibility list, blocking setup and storage pool creation with unverified third-party drives. However, with DSM 7.3, users can use third-party HDDs and SSDs like Seagate and Western Digital without losing crucial features such as storage pools, health monitoring, and firmware updates.
Note that while third-party drive support is restored for 3.5-inch and 2.5-inch SATA drives, M.2 storage drives still require official Synology-certified models for storage pool creation. The compatibility list on Synology’s website should be consulted for the most up-to-date verified drives, but the policy now allows broader use of third-party drives including Seagate IronWolf Pro.