How to Change In-File Delta Settings - SAFE Backup
In-File Delta performs block changes of files over 25MB, so rather than uploading the whole file it will only upload what has changed.
By default In-FIle Delta does incrementals Monday to Thursday, Saturday and Sunday, differentials are run on the Friday.
Log into your backup client and select "Backup Sets" and select the set in question.
On the left hand side select "Show advanced settings".
Select the "In-File Delta" option on the left.
Here you will see by default its incremental type. This means the backup will perform incremental block changes on files which are over 25MB
Advanced Settings are available for users to override the default settings. Here you will be able to specify when you want to run a full or differential delta file. You also can decide when an auto full delta file should be run.
Below is an example of when a full backup would be run, which is when 100 delta files have been created since the last full backup and when the differential delta is above 50% of the full delta file