So, after a lengthy battle today with WD, in which they denied there was any firmware update planned, and I explained that WD was placing user data at risk due to potential failures of the 4TB drives, WD finally relented and agreed to a replacement for a brand new drive within the serial number range stated in various articles. But an online representative declined to say if WD is actually recalling portable drives in this range. This is putting customers through a pretzel machine. First they asked if any data was corrupted using the 4TB drive. Then when challenged on the reported statements about a FW update, they denied. And then they deny any recall plans when asked directly. Finally, they agreed to replace my 4TB drive, but I'll have to send them the new SD Extreme just purchased from B&H, wth a 7 day or more wait. I would be interested to know if others have had this experience.