File Manager

It's a simple option that doesn't have a whole lot of flair. That is extremely preferable if you really just want something simple.

√ Easy access to local files:

All files are no longer hidden in the mobile system. File manager will help you find file, categorize file easily. It also supports tons of cool features: global search, moving, deleting, opening, and sharing files, as well as renaming, unzipping, and copy-paste.

√ Storage Keeper:

You can always know the storage of your phone, how much used and how much unused. Also, you can browse and edit all folders files by breadcrumb in the top.