Standalone USB File Transfer Device — Full Prototype (PCB, Firmware & Enclosure)

I am looking for an experienced embedded systems / hardware developer who can take a concept and deliver a complete, fully working prototype from start to finish. About the Project: The device is a small, standalone consumer electronics product that manages file operations between two connected USB storage drives — without requiring a computer. Full details will be shared after a short NDA is signed. What the Device Includes: USB-A and USB-C ports (USB 3.0) Small LCD display screen Simple navigation buttons Custom firmware for file detection, management, and transfer Basic physical enclosure (can be 3D printed for prototype stage) What I Need You to Deliver: PCB design and assembly Firmware development (file system, USB host, display/button interface) A complete, tested, working prototype Basic enclosure or case for the prototype