I don't understand why there are seperate "options" (in the overflow menu) and "settings" (extra activity accessible from the navigation drawer). I know that from the overflow menu, it is faster to access but I think that most items won't be changed that often because they are a thing of personal preference.

• Show hidden files
• Folders first
• Remember last folder
• Show folders size
• Show sections

Instead, I'd move all the items to the settings activity and remove the overflow item completely.