WD 5 Tb external drive won't mount
Hi all. I have a new 5Tb WD My Passport Ultra external drive. I formatted it in exFat in order to read/write in MacOS environment. It works fine on a PC. When I try to use it on my MBP running Catalina 10.15.6 it won't mount. Disk Utility First Aid shows no errors. The disk appears "grayed out" on the left in the utility. When I try to mount the disk I get the following error message "Could not mount "My Passport". (com.apple.Diskmanagment.disenter error 49223.)
Any thoughts? I've googled the error message and looked in this forum but can't seem to find anything that helps!