From the Store description:
Files&Folders is a fully functional file manager. Manage your files and folders, extract archives, watch videos, view pictures and listen to music.
App features under Windows 10 Mobile:
- file and folder options (copying, moving, renaming, deleting)
- opening and extracting files from archives (RAR, ZIP, 7z, ZipX, ISO, BZIP2, GZIP, TAR, ARJ, XZ, CAB...)
- built-in viewer and media player (jpeg, png, bmp, gif, tiff, mp3, wma, m4a, aac, wav, ac3, avi, 3gp, wmv, mp4, m4v, mov, mkv)
- audio playback in the background
- OneDrive support
- Dropbox support
- Google Drive support
- Yandex Disk support
- FTP support
- snapped mode support
- adding folders to Favorites and pinning them to the Start Screen
- charms support: Search and Share
- themes and backgrounds, Bing wallpaper
- video and image preview
- autorun when inserting portable devices and flash drives
- hotkey commands
Here's the utility in action:
You can buy Files&Folders Pro in the Store here - it seems almost permanently on special offer, at under £2! There's also a free 7 day trial and a 'Lite' version here.
PS. Note that the app does more things on the Desktop, appropriate for the screen size and form factor, and that one purchase enables installation on all your signed in devices and computers.