Purchased (2) on Jan 29th 2021. Both HD's are dead out of the package. Manufactured date = Dec 11 2020. One HD howls like a truck and will not mount. The other just starts spitting out numerous bad block errors. Didn't purchase instant product replacement.... now have to deal direct with WD, for something defective out of the package. Seems very wrong. I have (2) more of these on back order... now very worried that it's a bad batch. Not very confidence building, when wanting to using them to build a NAS. Poor rating is due to (2) special order dead HD's out of the package AND having to deal with WD directly... for (2) defective HD's out of the package!