Just when I thought I had a fair understanding of the Aconis imaging thing, I find out everything I thought I knew wasn't valid. 1/9 , I did a full hard drive image backup to my external USB drive. Yesterday, I did an incremental hard drive backup to my external USB drive. There are two backup files on my external USB drive. One says "My Backup", dated 1/9. The other says "My Backup (1)", dated 1/13. The "My Backup" (original full hard drive image) file is smaller than the "My Backup (1)" incremental backup file. What gives here? Can I delete the 1/9 file without causing any restore problem? Is the 1/13 file complete enough for a restore action? Should I do only full hard drive images? What kind of a backup strategy is optimal for always being ready to have to run a restore action?