Search suggestions
When you need to find a file or folder, the Search tab can help you remember through search suggestions. When you tap the Search bar, you can either start a new search or take a look at your previous search queries in the suggestions menu. As you begin a new search, suggestions of files, folders, and Automatic Collections that have matching terms appear as you type characters in the search bar.
You can tap one of the saved queries to conduct a search with it again. EdgeRover™ saves the last five searches, so you can quickly repeat this previous task.
There are a couple of actions available on the Search tab. You can tap Delete 
to remove a query from your search history, or tap Clear all to delete your entire search history.
Note: Automatic collections don’t appear if there aren’t any matching terms.