Western Digital WD40EFRX WD Red NAS Hard Drive - Hard drive - 4 TB - internal - 3.5 inch - SATA 6Gb/s - buffer: 64 MB - for WD My Cloud EX2, EX4

It does it’s job well! Good price too

WD has come out with newer Red drives using SMR technology. Do NOT buy these as they will NOT work properly in a NAS Array and will give you an error while building. You must be sure to get the Red Plus or Pro with CMR technology. I do not understand how WD could release a drive for NAS use like this.Also, I noticed that their quality control is slipping. I have a couple of large arrays and the WD Red drives are failing more often than before.

My hard drive arrived in bubble bags instead of the proper packaging. It made an awful sound when inserted into my drive array and would not initialize. Mechanical hard drives are sensitive to shock and cannot be warehoused or transported outside of a shock absorbing box. Returning this drive for a refund.

I purchased 2 of these drive in U-LN condition. One drive is acceptable with total 439 days of use and 43 total Start/Stop counts. I am returning the 2nd drive as has 1,429 total days of use recorded, an estimated 395 days of life remaining and 57,308 total registered Start/Stops. Completely UNACCEPTABLE!!! I used Hard Disk Sentinel to check the drive upon arrival.

NADA DEL OTRO MUNDO

No where does this drive say used. I installed it into my Synology and checked the health and to my surprise it shows 3356 hours on it which is just shy of 140 full days. It would be nice to know I wasn't getting a new product. I do not like being lied to. I'm sure the drive is fine but I would not have purchased had I known.