Western Digital 16TB Hard Drive

I bought two of WD Red PRO 18TB in October when they were on sale to replace the current disks in my Home Backup NAS. I bought 2 because I need two identical drives for the NAS. Disk 1 arrived a few days later and disk 2 arrived a few days later. And now the problems begun: Disk 2 which was sent to me wasn't an 18TB drive, it was only 6TB! A harmless mistake? Fraud? Who knows... Very annoying anyways... Now I tried to get disk 2 exchanged, but Amazon could only offer a refund, because the drives were out of stock with unknown restock date. Too bad because I didn't want a refund, since I got the drives for a good price and now they were more than 25% more expensive... So I had to wait about 3 weeks for the disk to be back in stock and be able to have it exchanged instead of just getting a refund. Today the exchanged drive finally arrived. This time it was as ordered 18TB. I installed both drives in my NAS. One drive was GOOD the other was recognized as BAD during the drive self test. The temperature reading was off and caused a S.M.A.R.T error. In fact there was no temperature reading at all for 1 drive. So I let the drive warm up for a few hours and tried it again. Same thing. SMART could no be read and there was no temperature shown for 1 of the 2 drives. I took both drives out of the NAS and tried to see what's going on by installing them in a Windows PC. One drive is fine. SMART is OK. No errors. The other drives just makes a weird repetitive noise and doesn't spin up. It's not recognized by windows. It's DOA (Dead On Arrival)! I checked which drive it was and it was the 2nd drive. The one I received as replacement today! So after the long wait and the whole odyssey of exchanging the drive the drive arrived DOA. Was it bad luck? Maybe. Do I trust these drives? No, not anymore. Never had a drive DOA. This was by far my worst experience buying Western Digital drives on Amazon! And I have quite a lot of them (in total probably about 16 different WD Elements and MyBooks). Since these 2 drives were supposed to be used in a NAS which should hold the backups of my personal and work PCs I thought I'd buy the more expensive "real" WD Red Pro drives, which are designed for 24/7 operation, but what did I get? Just a way too long frustrating experience overall. Maybe I was just unlucky in this case, but I never had a problem with a shucked drive. So back to shucking external drives... I CANNOT recommend the WD Red Pro 18TB drives at this point. PS: the HDD came in the original Western Digital box which then was packed in one of the thin Amazon air bubble envelopes. Maybe it's an issue that the drives aren't shipped better protected? Not sure. The delivery driver dropped it off quite carefully, though. No idea what happened to the drive in between...