UiPath.MicrosoftOffice365.Activities Find FIles and folders Query string

I am trying to use the FInd files and folders feature for office 365. The UiPath documents just say check the api which I did and still cant figure out the santax of the query string. Does anbody know how to do a simple QUeyr for a file name? I am able to pull all files from the driectory by simply leaving it blank, and I then use a for each item to look for the item.Name. It would be a lot better to use a query though.

The question: How do I make a query for FInd files and folders for the file “Hello.txt”?