WD SE 4 TB 7200 RPM 3.5-inch SATA-600 internal Hard drive - buffer: 64 MB

Superb !I have 4 in my Ready NAS 316 and two as spares ready to go in when I need the extra space. They run a little hotter than my 2Tb Samsung's in my old NAS NV+ but have been quiet and reliable. Thoroughly recommended for a NAS and worth the slight extra over a PC style drive.

Bought 5 of these for my synology 1815+. I was not very comfortable with the wd red reviews and the performance for the 4tb version. I have used the 3tb Reds for my previous nas and they worked very well.Overall, the SE drives arrived well packed and in their individual boxes. There was plenty of packaging to minimize damage whilst shipping to France. The drives installed on the 1815+ easily. Slightly more noisy than the 3tb Red drives, but not distracting in the living room. They are now set up in SHR and working well and hibernate when not needed. Happy and thinking of getting some more.

I've got 7 WD SE 2.0TB drives running in a RAID 5 array using an old LSI megaRAID 8888elp via an intel expander. Running openSUSE 13.1 and performance has been excellent at 450-600mb/s benchmarked, more than sufficient to saturate gigabit lan. Hopefully the lower URE will help when a rebuild is eventually required.

Arrived 1-day late sent to wrong Depot by DPD.Of the Three drives ordered1/ One is fatally defective (Too many reallocated events SMART-196, retired block count SMART-5 value too high).2/ The second just described at Abnormal by the QNAP NAS3/ The third disk is OK - But don't want it as part of this defective batch.Have not attempted a FULL test of the disks.Initial attempt to make into a RAID array on QNAP crashed the NAS requiring a re-boot.Spent too long on this problem - Amazon accepting return & refund.Have 5-other disks of the same type - No problems (Query bad batch of these)Will buy three more from elsewhere to avoid the bad lot.So sad, there generally great drives with a 5-Year warranty - Just got to survive the 1st day I guess :-(

this is a sturdy little HDD, from a good quality brand name. I can barely hear the drive, and when I can the action is very smooth. No warmer than most drives, Not a single problem with this drive. Now the packaging, Amazon have done it again!. They never cease to amaze me with packaging ideas, Large box with a wedge shaped card inside, with the drive firmly fixed on that with cling film.

I now have 6 of these (along side 6 Samsung 'old' drives) in my Synology DS2413+ NAS and they are brilliant.The Samsung drives were fantastic as well, but only 2TB. These WD 4TB drives are worth every penny. When I can afford to, I'll purchase another 6.

I got this drive to act as my Time Machine drive. I thought spending a bit more and getting 4 TB was probably a good idea - so I can not have to worry about my back up disk for a good few years. The warranty adds to that piece of mind, so I'm happy I got this drive.I got it with the Icy Box IB-318StU3-B Premium Aluminium Case for 3.5 inch SATA HDD with USB 3.0 Interface and it's worked well so far.

Fantastic drive - replaces failed RAID drive in NAS WD-Sentinel-dx4000