I work on DriveDroid on and off. It's an Android app where you can 'host' ISO/IMG files as if they were real CD/USB drives. It makes it possible to, for example, boot your PC from your phone with live Linux distros.

DriveDroid (Free): https://play.google.com/store/apps/details?id=com.softwareba...

DriveDroid (Paid): https://play.google.com/store/apps/details?id=com.softwareba...