Free iOS Apps AirDisk Pro & Boximize

This app mounts iOS storage via WiFi which can be accessed through any browser [Mac/Windows/Linux].
App has an in-app purchase for cloud service integration but not required.
App has built-in support for several file formats:
Audio (WAV, MP3, M4A, CAF, AIF, AIFF, AAC)
Images (JPG, PNG, GIF, BMP, TIF, TIFF, ICO)
Movies (MP4, MOV, MPV, M4V)
iWorks (Pages, numbers, and Keynote)
Microsoft Office (Word, Excel and PowerPoint)
RTF (Rich Text Format)
RTFD (TextEdit with embedded images)
PDF Documents
Plain text
Source code

HTML web pages
Web archives

https://itunes.apple.com/app/id505904421?

Boximize
https://itunes.apple.com/us/app/boximize/id828889086