What is the difference between incremental backup and differential backup?
Differential backups will select only files that are changed since the last backup.
Incremental backups will select only the data that has changed since the last backup.
Example, On Sunday you do a backup of a 5 text file each of 40 MB. Total backup size will be 200MB
On Monday you change 2 lines in just ONE of the text file.
Under Differential backup, only the changed text file will be backed up. Total backup size will be 40MB
Under Incremental backup, only the data corresponding to the 2 lines will be backed up. Total backup size will be just in bytes.