Sam D21 USB CDC to uSD as an external Hard Drive

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Recently I bought a ATSAMD21 Xplained Pro kit, with a I/01 Xplained module. The I/01 has a uSD card socket on it.

In Atmel Studio they have some great examples. Sadly the one I was looking for they dont quite have.

I am looking to make use of the "USB Composite Example CDC and MSC"  This does work fine when I plug the kit into my computer it shows up as a external hard drive. What I am looking for is an example just like this but that it will use the uSD card instead of internal memory.  I have contacted ATMEL support days ago, but have not heard anything back about it.

 

Does anyone have a clue how to implement this that could pass along some help please.