Western Digital 16TB WD Red Pro NAS Internal Hard Drive HDD - 7200 RPM, SATA 6 Gb/s, CMR, 256 MB Cache, 3.5 - WD161KFGX

I use this for my NAS. I popped it it, hot-swapped, and it was recognized, formatted, and all the stuff from my other drive copied over without skipping a beat. After formatting, 14.7 TB is left for use. A good product.

First comment: Typical Amazon Quality Service. So far WD4TB Pro bare hard drive is absolutely quiet, vibrationless, super easy to initialize then format to ExFAT and only slightly warm to the touch. Hooked it up with a Unitek IDE/SATA to USB C 3.0 Adapter for now before mounting in stand alone case. Been using WD drives for a number of years so expect this new one will be as durable as the last.

Using 2, 4TB drives in a home RAID array for photos, videos, etc. Main drive is an SSD but decided to go with these for bulk storage as they are a bit cheaper (guessing my last time buying HDDs and next time will just use SSDs because they are just so much faster). Drives seems to perform nicely and other than a little HDD noise here and there dont find them bothersome at all. Previously had 2, 2TB of these red drives in a RAID array (had it running for about 8 years) and never had any issues. In our office we have Gold versions of these running on a backup server for about 6 years with no issues. All in all, very reliable. Speed is fine, but obviously not going to compare to SSD. One thing about size of the drives which I see some comments on... The size of the 4TB drive is going to be approximately 4 trillion bytes (mine is 4,000,765,177,856 bytes), however your system will likely report that as 3.64 TB or 3.726 GB. The reason for this is that Windows computes 1GB as equal to 1,073,741,824 bytes and 1TB as equal to 1,099,511,627,776 bytes. These numbers are achieved by raising 2 to an increasingly greater power till you get your first number in the billions and then trillions. There is some technical reason why this is done, but ultimately it is just confusing as it creates 2 different ways of computing size. One, counting the actual number of bytes and the other, dividing your bytes by one of those numbers to get the amount of GBs or TBs. For MB the number Windows uses is 1,048,576 bytes (for example a 20,000,0000 byte file will be reported as 20,000,000 / 1,048,576 = 19.07MB). In any case, here is a summary of the approx drives sizes and around what Windows will report the size as (assuming the drives sizes represent actual bytes exactly, so 4TB for this calculation will be 4,000,000,000 bytes and not the number my computer showed above... so expect the actual numbers to be slightly higher than these): 2TB Drive = 1.82TB or 1,862.65GB 4TB Drive = 3.64TB or 3,725.29GB 6TB Drive = 5.46TB or 5,587.94GB 8TB Drive = 7.28TB or 7,450.58GB 10TB Drive = 9.09TB or 9,313.23GB 20TB Drive = 18.19TB or 18,626.45GB Hope this clears up some confusion here.

I purchased this unsure if the WD PR2100 would work with such a large drive (wasnt documented at the time of purchase). Dropped it in without issue; formatted and ready to go within an hour of getting the package from UPS.

Bought four to add to my Synology NAS. Its only rated up to 14TB, but these worked just fine. No issues so far, but its been less than a week.

I use a good handful of these drives in a few different NAS units. They infrequently fail and are reliably running 24/7/365. I started with 6tb drives. If I were starting fresh I would probably use slightly larger drives. I don’t know if the larger drives are less reliable or the same, but I have been very satisfied. Never forget that RAID is not the same as a backup and you will never lose a byte.

Got my drive today and it runs as expected. I can only say if you have a loud drive then you ordered a knockoff. My Pro drive runs at same noise level as any other drive in my system. My warranty status is perfect 5 years so I ordered another to have on hand which was probably dumb since these will probably outlive warranty by many years. Probable use it to back some lower priority data

Ive never had any problems with any WD drive Ive ever purchased, but I received one this past week that would not work in my new NAS. I submitted an exchange and they quickly sent out another before I could send the bad one back. Very impressed with the customer service - highly recommend.

I purchased 5 18TB drives and have only received 3 so far. One was a 6TB drive that was mislabeled on the unopened package. I got a replacement and it was the proper size drive, but was DOA. The two drives that have worked are running great. I was able to backup just over 20TB between them and the speeds have been as expected.

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