The most possible reason that results in the failure of hard drive mounting, I speculate, can be the incompatibility of the new macOS and NTFS for Mac utility. You can try another NTFS for Mac toolkit that always follows macOS updates closely, that is, iBoysoft NTFS for Mac.
Once you install this software on your Mac, iBoysoft NTFS for Mac mounts your Western Digital EasyStore hard drive in read & write mode automatically. For more info, please visit: External Hard Drive Not Mounting on Mac, How to Fix It?