I have been using the older version of Backup and it has worked great, backing up everyday as I scheduled from my Computer to my external HD. When the new version of Backup arrived, when it starts backing up it says Backing up " Migrated Drive Plan ". For some reason in my External HD, I have my old Backup file which is like 70 Gb, and now a new file Migrated Drive Plan... should I throw away my old Backup file, because obviously both files won't fit in my External HD.