What is the smallest file size of different Backup formats

I would like to know what is the smallest file size (highest compression) of the different Comodo Backup formats - CBU, ZIP & self extracting CBU. Is a ZIP file smaller than a self-extracting CBU?

Many thanks,


To answer your question ZIP has the smallest file size. ZIP and CBU formats are almost equal in sizes when using highest compression. CBU is optimized for backup purposes while ZIP it’s optimized for archiving purposes.
ZIP may have the a slight advantage on size, but CBU has some other following advantages:

  • 64KB block level incremental/differential backup.
  • you may store multiple backups in the same file.
  • CBU backups can be mounted as virtual drives.
  • full backup encryption
  • it backs up file security rights and file times (date last written / date created)