To create a sub folder, first open the folder you want it to appear in by tapping on it, then tap the '+' and create the folder as above. Simply tap the red '+' button in the bottom right-hand corner and select 'New Folder'. Here are some top tips for making your digital drop box a whole lot easier to navigate.
If you have just been dropping files into your Google Drive without much organization, then you'll want to know the options you have for bringing some order to the chaos. Organizing Your Files in Google Drive for iPad
