WD My Passport Ultra is not accessible

Trying to change security and access to my WD My Passport Ultra, I removed access (unchecked) allow and clicked DENY on System and Users and left the Admin on ALLOW now my Drive will not show as My Passport but as Local Disk (P:) and will not allow access. When I click on it, window opens with “Location is not available” label and says P:\ is not accessible. Access is denied.
I go to WD Unlocker, it says This drive is not locked.
Can anyone help me resolve this?
Thank you!