I bought two units of the 20TB version of this WD Red Pro drive for my new storage system. I particularly went with the 20TB version, because - according to the datasheet on Western Digital's website - it is less noisy than some of the lower capacity models.I tested one of the units, not in my storage system, but in my open bench USB 3.0 to SATA Adapter (with a max transfer rate of over 500MBps). It performed well, the sequential read and write speeds as high as ca. 270 MBps and ca. 130 MBps on the low-side. This is typical of all HDDs: on the outside of the drive they can pack more data on one track than on the inside, so on each rotation they can write and read more data on the outside area of each disk platter. The write and read tests were also successful, no bad blocks were reported. For some performance figures, please see the attached screenshots (which have the serial number removed/redacted). Please note that the CrystalDiskMark results are performed on an empty HDD, so they seem to be executed in the "fast" section of the drive. The other graphs were taken from HDSentinel, relevant there are the bottom graphs, which show transfer rates across the surface of the drive.The sound of my test unit was also pleasant enough, the clicking wasn't too bothersome. But since I will move this drive into the case of my storage system very soon, the clicking will be a lot less noticeable than it is already.One action I always perform, BEFORE opening the product box of an HDD or SDD is to check the serial number on the box against the manufacturer's warranty website to ensure that the item is covered by the manufacturer's warranty. I do this both when amazon is the seller and when a 3rd party is the seller and amazon is just the fulfillment party. (I do not buy HDDs from a 3rd party seller that does not have fulfillment with amazon.) This is to avoid OEM/gray-market units that aren't covered by the manufacturer's warranty. A store warranty by a 3rd party seller is of no use to me, since these sellers come and go and I also don't want the hassle of dealing with them. Since the Red Pro series offers a manufacturer's warranty of 5 years, and HDDs fail frequently enough to make such a warranty very valuable, I always insist getting the manufacturer's warranty and even will query 3rd party sellers, if their stock with amazon is covered by such a warranty.As it turned out, the serial number of second 20TB HDD that I ordered (from a 3rd party seller, since amazon themselves were out of stock) did not show up in the manufacturer's database for U.S. warranty, so I can only assume that it is a gray-market unit and I immediately returned it. (I can only hope that the 3rd party seller will have to bear the full cost of this return, since I emailed them and asked about the manufacturer's warranty, before the item ever shipped, but they didn't answer my question.)One more tip: There has been some research that failure rates of HDDs from the same batch are somewhat correlated, so I always try to space out my purchases (either in time or by using different vendors) to increase the chance that I will be getting units from different batches. That's why I bought from two different 3rd party sellers on amazon (one of which apparently sold a grey-market unit), without disclosing that fact ahead of time.

I am using these on my Synology NAS for 12TB of RAID 5 storage and they are happy to be workings and are quick for both large and small files. The price was right and having our own home NAS with Cloud backup and not having some 3rd party being able to peruse it at their will makes us feel safer and more secure.

These took under a minute each to install into my Synology DS920+ NAS. Since it was all new gear, I let it do a through drive check as part of initializing which took a long time. I think it may ave been about two days. In theory, I could have used it during this time, but I just started it and ignored it.During installation, the 920 whines about any accessories (memory, drives) that aren't Synology's own and that included these. On the 922, they change from whining to much more obnoxious contrived incompatibilities, but this combination was chosen because exactly once, during insteallation, it warns you that its not a supported combination and that's that. Probably if there were a support issue involving data loss, they'd remind you of that oath you took to not complain, but in reality this is a very common combination that works quite well.Fan and normal noise is quite minimal. There was a noticeable clunk during a head seek. I reduced this by offlining the unit so I could remove power then applying the fuzzy half of a hook-and-loop fastener to the bottom of the bottom rail. That gave it support and a little bit of padding so the metal cage didn't serve as a drum skin for the oh-so-tiny motion that got amplified when transferred to the sheet metal.I'm looking forward to getting many, many years from these drives, like I did from the 4TB WD these are replacing. Those drives have no reading errors. Size grows and no drives are infallible, so I opted to replace them on my schedule (OK, and on Amazon Day special. :-) ) instead of letting the drive pick its own replacement day, taking my data with it.

I had to replace 4 x 4TB WD Red Pros - they were almost 8 years old, in constant service, and one of them started to show reallocated sectors, so time to go. My only choice for all NAS HDDs, both at home and work are WD Red Pros. They're more expensive, perform well, and rarely if ever fail. I considered switching to Seagate Iron Wolf, but they weren't available, and in the end, the WD Red Pros were about the same price, with known reliability.My one minor gripe, and this likely isn't unique to WD: I appreciate the thought of including drive screws with the drives, but for NAS drives in particular, why did you include screws that have no hope of ever fitting into a NAS, which likely will use hot-swap trays? (Fat, round-head screws). Fortunately, in my case, my NAS (QNAP) came with a plethora of drive screws, including low-profile flat head screws of the correct threading.

I purchased 2 4TB WD Red Plus NAS to replace and upgrade 2 2TB Seagates on my Buffalo LinkStation 220D. Worked like a dream. Not only do I have to worry about running out of space, I don't need to worry about the need to continually replace the hard drives, hopefully. It took awhile to determine the 220D was turned on because I couldn't hear the hard drives - a bonus, as the Seagates were a little noisey. I just finished replacing them and hopefully will have no need to make changes to what I written here as I expect to have no problems with the hard drives. As I understand, you can purchase a buffalo that comes with the WD Red Plus NAS drives - niceeeee....

Todo de acuerdo a lo esperado, hasta ahora trabajando sin problemas y llegó mucho mejor empaquetado que los que envía directamente Amazon, últimamente Amazon envía los discos duros en sobre con prácticamente nada de protección más que las pequeñas burbujas que trae el interior del sobre, no he tenido problemas tampoco y no me preocupa tanto por la excelente política de devoluciones de Amazon pero definitivamente no es la mejor forma de empaquetar un disco duro, en este caso el disco llegó en caja con algo de protección extra, se agradece.

Comprei para compor o volume de storage de NAS da synology. HD compatível e suportado pela Synology, foi perfeito para expandir a capacidade de armazenamento. Vendedor entregou no prazo correto com produto em bom funcionamento e condições apesar de embalado apenas com 2 plásticos finos. Hard drives requerem cuidado adicional para proteção.

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Buen producto, por el precio