Why doesn't "back up now" appear in the list anymore?
I have been successfully using Western Digital My Passport Studio to back up my MacBook Pro for some time now. Once it mounts to the desktop, I right click and then select "Back Up Now" from the list of actions. Today when I connected it and it mounted, "Back Up Now" no longer appears in the list and I can't figure out anyway to make it start. It didn't start automatically after waiting, it didn't help anything to unmount it and restart the computer. Any suggestions why this would happen or another way to begin the back up?