Western Digital 6TB WD Red Pro NAS Internal Hard Drive HDD - 7200 RPM, SATA 6 Gb/s, CMR, 256 MB Cache, 3.5" - WD6003FFBX

I purchased the 4T version for home PC with a windows operating system. I need this particular HDD because it is listed 7200RPM. I didn't meet any challenge when I installed other WD hard drives. It involved only a few clicks when I switched from WD 1T to 2T months ago, for example. I simply inserted the new disk into a USB case and cloned the entire disk in Minitool participation and got the job done.I was not lucky with this disk. It gave me so much trouble and wasted my two days to figure this out. First, sector size was different from my old 2t WD Blue drive thus I couldn't clone it directly. Because the target drive was not the main OS drive so I decided to simply copy all the folders into the new HDD and switch the two.Then I used Minitool to format it. It refused the command, software reported error. I then tried all other software including the one recommended on WD website (Acronis True Image for Western Digital). I finally got it done by using EaseUS. I formatted it and copied all folders from the old disk and switched it with the old internal disk. When I opened windows, none of the partitions created in EaseUS showed up. HDD showed up in BIOS menu so I knew it was there. I googled answer to this problem, read all articles to educate myself. Checked "Manage disk" in OS and realized one of the partitions was listed as GPT protective partition. I then followed the article published on Seagate website (ironic) and cleaned the entire disk using diskpat command. All data were removed. I returned to day 1.If your partition software doesn't work in Windows, check whether this disk is GPT protective in disk management. Don't repeat my mistake.I am glad I didn't do anything harmful to the old drive thus I spent the second day repeating what I did before, copy and paste. Now the new drive works and it works faster than old WD blue 2T. It is quite noisy but not scary. I am satisfied with the product so far but I hope WD can improve the product to meet various needs from customers. I am not a tech guy but switching HDD shouldn't be so difficult and time-consuming, thus I removed one star (should have been two stars when I felt frustrated yesterday).

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 HDD's and next time will just use SSD's because they are just so much faster).Drives seems to perform nicely and other than a little HDD noise here and there don't 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 GB's or TB's. 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 1,862.65GB4TB Drive = 3.64TB or 3,725.29GB6TB Drive = 5.46TB or 5,587.94GB8TB Drive = 7.28TB or 7,450.58GB10TB Drive = 9.09TB or 9,313.23GB20TB Drive = 18.19TB or 18,626.45GBHope this clears up some confusion here.