What is the difference between a Full, Differential and Incremental backup?

 A Full Backup is a complete backup of all files on the designated hard drive.

An Incremental Backup is a backup of all changed files since the last Full or Incremental backup. For example:

• Sunday - Full Backup
• Monday - All changed files since Sunday
• Tuesday - All changed files since Monday

A Differential Backup is a backup of all changed files since the last Full Backup. For example:

• Sunday- Full Backup
• Monday - All changed files since Sunday
• Tuesday - All changed files since Sunday, including Monday's changed files