The backup disk image “/Volumes/window/Willy Mac.sparsebundle” could not be accessed (error -1).
The backup disk image “/Volumes/window/Willy Mac.sparsebundle” could not be accessed (error -1).
The backup disk image “/Volumes/window/Willy Mac.sparsebundle” could not be accessed (error -1).
Look over to the right of this page under the heading of More Like This for multiple answers and solutions.
Also see # C17 in Time Machine -- Troubleshooting
The backup disk image “/Volumes/window/Willy Mac.sparsebundle” could not be accessed (error -1).