McAfee Online Backup backup software lets you define custom backup sets for your specific needs. When you create or edit a backup set, you can specify files or folders to include or exclude according to criteria you define, such as file type, date created, or size.
For example, if you have a large number of images on your computer, but only want to back up the final versions of these images, you can create a custom backup set to only look for image files in your Final Images folder.
If you cannot change this setting and you use Windows, you may be able to resolve this issue yourself. For more information, see If Settings Are Greyed Out in the McAfee Online Backup Backup Software for Windows. You may not be able to change this setting if your account administrator is managing it for you.