RN10400 Factory Reset

Have you tested that the new drive is good?  Bad drives straight from the factory do occur.  Vendor tools on a PC and connecting the drive via SATA or a USB-to-SATA dock is the best way to test them

Did you check the old drive?   It's possible that the NAS was the problem, not the drive.

I hope you realize that a factory reset deletes all your data. As schumaku stated, a reset is not normally required for a drive replacement.  If your volume is a JBOD of multiple drives, then deleting and re-creating the volume would be necessary, or you could just do a factory reset.

You could test the NAS to see if all the bays are OK.  Remove all the drives, labeling so you put them back where they belong in the end.  Then put in just a drive that contains no data you care about.  If it tested fine, the new one you bought should work for this.  With just that drive installed, create a volume.  Once that's complete, power down and move the drive to the next bay and power up.  You won't have to create a volume again.  Continue until all bays are tested.