Bought for my Synology DS415 NAS, the 2 discs work fine. Although packed by Amazon, no malfunction. I ordered 2 more in another internet marketer (well known that eventually discount ...) as they were in stock. Ultimately Amazon sent me the 2 after 10d (4 weeks while they announced deadlines) and one of those that I have received from the other dealer is defective ... I do not know if it comes from Lots of dealers. In any case the replacement procedure WD appears to be fast and efficient (I've made today in advance replacement). And do not forget to register your products on the WD website, it allows you to have the conditions and dates guarantee. Version in bulk, it is not necessarily indicated in the box! To see in the duration disk reliability ... A 4 stars for 1 of 4 defective!
