The external HD is connected and running since then (4 weeks) quietly, quickly and quietly as USB3 backup disk to the Synology DS 213+. It is processed properly and also very easy to stay cool and not vibrate. The sleep mode is also supported, the plate is switched off depending on the setting of the DS. I can recommend this device for this purpose. For each NAS, especially of course other manufacturers, however, a look at any available compatibility lists is useful, this I had done before buying. There I found not exact product, but related external HD from Western Digital, but this was enough already. Delivery as usual quickly and orderly.
