wd40efrx dead

i got the WD wd40efrx red 4 TB today and run for 1 hour dead in my new nas also i got today run fine got two of the 4 TB that run fine too 

I’m sorry to heard that you got a drive that failed. If the other drives are working fine, it sounds like you may just have received a bad drive or it may have been damaged during shipping. I would recommend that you return it to the place of purchase for a replacement drive.