Failed backup from Time Machine to My Passport for Mac external hard drive
My Passport for Mac has worked to accept backups from Time Machine, but now I get an error message stating that it can't do it any longer. I tried to run First Aid using Disk Utilities, but get an error message there too. In the exclusion box, My Passport for Mac appears but is grayed out, so I can't delete it from that file. Any thoughts?
iMac 21.5″, macOS 10.15