Western Digital 10TB WD Red Pro NAS Internal Hard Drive - 7200 RPM Class, SATA 6 Gb/s, CMR, 256 MB Cache, 3.5"

They are significantly louder than my old 4TB Reds but these seem to be the tiniest bit better performance wise. Previously my NAS could easily sit in my media cabinet and now its so loud I need to move it somewhere else. Vibration and seeking noises mostly. That's the trade off I guess for keeping the 4 bay NAS but needing more space. If I was starting from scratch I would get more bays and smaller quieter drives.

My old seagate central died after some 7 years. fortunately my data was backed up and lost some minor work, very important for me was to be able to back up frequently without the need to have RAID configuration (i.e. more expensive) and use my decent 8tb external seagate. I found Synology has an app that lets you do that called USB COPY, so I went for a 1 bay Synology: works like a charm. Initially this WD drive had some terrible noise, really ugly. loud and the tone was particulary anoying, I wanted to blame this WD, but found that was the Synology DS; did some fix the DS and noise levels are now acceptable, not easy did not want to mess with the drive cooling.

I bought two of these to replace 5 TB drives in an NAS device. The install was easy as you first install one drive and wait for it to be integrated into the RAID scheme. Once it is fully integrated you install the second and wait for it to integrate into RAID also. Both drives integrated as expected and they have been running 24/7 since then without a hiccup.I have had good experience with the WD Pro Red series for NAS devices. Over the past ten years not a single failure. Only one drive of several had some reallocated sectors but not enough for the drive to fail.

I have two of the drives installed in a two bay NAS and the performance is fantastic in Raid 1. I just wish they were a bit quieter. They would be 5 stars if not for the noise.