I am trying to backup to the Time Machine partition on my Apollo Cloud. When I try to select the partition I get the following message, "The disk image "xxxxxxxxxxxxxx" is in use. Try ejecting the disk image.

I have tried to delete the sparsebundle but I'm unable to do this. I can back up to another partition not to the Time Machine, frustrating! I would like to delete the sparsebundle so that I can start again with a fresh backup.