The NARF File Manager is a free and (until further notice) robust application that enables you to manage files and folders on your device. It can open files in other applications, copy, move, search, rename or delete files and folders, attach files to emails, and preview, extract or create zip archives. Furthermore, the NARF file manager can provide file selection dialogs to other applications.
Version 2.7 introduces major UI changes. If you want to downgrade to the old UI, you can get the old APK at http://www.narf.mobi/app/file.
Force file scanner update when clicking refresh to reflect changes on MTP service.