Did I understand it correctly(this was always bothering me)
When you add file or folder to the list,enabling a check box means to exclude that action and not enabling the check box means to execute the scanning.
For example if I add C:\New Folder\*
Checked check box on write,means that avast will not attempt to scan the files saved in that directory.
If a checkbox is not enabled on the other two options,will mean that avast will scan any file that is executed from that folder or something tries to read a file from that folder
