Q:

"Apply only permissions changes on sub-elements" or "Apply permissions changes only on sub elements"? 

In a web-application where you can manage and organize resources (eg.:  files, events, discussions/chat and so on) inside a certain structure (lets say folder structure) and you can grant permissions to users on these resources. 
If you want to inform the user that he is going to make a permissions change only on the sub-folders and not in the folder he's currently working, is it more correct to say : 

Apply only permissions changes on sub-folders

or

Apply permissions changes only on sub-folders

I'm Italian and for me the second sentence ( position of only ) looks more correct/suitable for what I'm trying to say 

A:

Since these permissions changes will be made only on the sub-folders as you mentioned in your question, I think it is more correct to say:

Apply permissions changes only on sub-folders

