DSLR to Mobile Transfer App

I'm looking for a developer to create an application that allows users to save photos and videos from their DSLR cameras (Sony, Canon, Nikon) REAL TIME to their mobile phone storage via USB cable while keeping the copy on Camera SD Card .

Requirements:
- Support Android
- Seamless transfer of images and videos
- User-friendly interface

Ideal skills and experience:
- Mobile app development (iOS and Android)
- Experience with USB data transfer protocols
- Familiarity with DSLR camera file systems