iFiles+ is the best way to manage all your files on iOS devices.

Manage files from different devices and platforms with ease. Backup iOS Photos / Contacts / Calendar data to external storage and keep control of your data!

Secure physical access to the Lighting connector / USB port / app with passcode or Touch/Face ID (available on selected models).

Also include utilities: Cloud storage manager, voice recorder, file zip/unzip, text editor, take camera/video with advanced manual settings and save RAW file to external storage directly (require iOS 10 on iPhone 6s / iPad Pro Gen1 or later), etc.

Supported File Formats:
Document: Pages, Numbers, Keynote, doc, docx, xls, xlsx, ppt, pptx, rtf, txt, html, PDF
Image: jpg, png, bmp, gif, tif, tiff, ico, xbm, cur, RAW (require iOS 10 or later)
Audio: mp3, aac, aif, aiff, wav, m4a, caf, FLAC
Video: mp4, mov, m4v (without DRM), mkv, avi, flv, rm, rmvb, wmv, vob, 3gp
Other: zip

This app is compatible with:
PhotoFast TubeDrive / TubeReader
PhotoFast iType-C / iType-C Reader series
PhotoFast MAX series
PhotoFast iOS Card Readers
PhotoFast MemoriesCable series
PhotoFast Artemis 6 (Dual SIM)
PhotoFast BackupDock
PhotoFast EVO/EVO Plus

More information: https://www.photofast.com/