Western Digital Ultrastar 7K4000 4TB

Part number HUS724040ALA640 - 0F14688 · 3.5" SATA HDD · Enterprise class · up to 4 TB

This drive is on Synology's official compatibility list for 54 machines (list read 2026-10-28). If your model is below, the drive is officially listed — not an unofficial workaround.

Compatible Synology models

Click any model for its full compatibility list and pick guidance.