Differential backupDifferential backup allows users to copy files created or changed since the last full or incremental backup. It does not mark files as having been backed up. If you are performing a combination of full and differential backups, restoration of files and folders requires that you have the last full as well as the last differential backup.
Testimonials and User Comments
 I recently purchased Acronis True Image Deluxe. It is brilliant and well done, and it leaves Ghost for dead. I only wish I had known about Acronis True Image Deluxe years ago. Thanks again, well done!
SJohn Southwell
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Acronis Inc. Backup software.