I've now had this drive for two years and it's my main drive. I've had no problems with it. You will hear a bit of noise from it during heavy use.

Couldn't be happier with this.

At end of Jan I originally bought a WD BLACK SERIES WD4003FZEX 4TB 7200 RPM 64MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive. It was DOA. WD quickly sent me a replacement. I just noticed today (ok, sometimes I'm slow) that instead ot the WD4003FZEX, they sent me the much more expensive WD4001FAEX.

Big; fast

very slow to wake up

7200rpm, 4TB, what else is there to say. since IBM/HGST/whoever they just got sold too isn't IBM anymore, and given the SOLID state (no pun intended) of the (*)raptors and external RAID storage I've just stopped looking outside of WD. This is the new IBM; IMO.

I Bought these drives to replace my current 2TB WD Caviar Black Drives (3 total)on my desktop. I have used them for 3 years with no trouble and expected to get the same results for these larger drives.

I get these drives for their reliability. 5 year warranty says it all really.

Western Digital have been at the forefront of storage solutions for a solid number of years, and it's their commitment to research and development that has enabled them to keep this position.

I purchased this drive and put it in a USB 3.0 external enclosure. The speeds are blazing fast and very quite. I don't have exact numbers of transfer rates, but well satisfied. If you are going to do the same and use in external enclosure, make sure that external enclosure can handle 3 or 4 TB...

Bigger drives are better value, more space for your money. Performance is good, it does not need to be a fast dive from bulk storage my OS is on a SSD. 4T is a big chunk of storage, easy to install and set up on W7 b4bit system. I would advise you to use GTP option before you format your dive.

In the review of the WD RE 4 TB we wrote that it contained four 1TB platters, but it turns out that's not the case. With the information we now have it appears that both that WD RE 4TB and this Caviar Black 4 TB use five 800 GB platters.