Mass storage with nRF51?

[Sensors]

I have a project that requires a bluetooth central to be used to gather data from a HRM service, which shouldn't be too much of an issue. However, it also has to store this, and other local sensor data to some sort of storage device (perhaps microSD or Flash memory).

I want to be able to access this data from a PC or other device, but I'm not sure if the nRF51 or nRF52 has the ability to support a file system and act as a USB mass storage device. Would I need to use an additional part to make this possible? If so, what options do I have?

Thanks

[RK]

well the cheapest USB MSD chip I can find is some OTI device which you can get for $1.50 a pop but interfaces directly to NAND memory and still needs a crystal. Octopart tells me I can get ATSAMD11 for about $2.20 a pop, doesn't need a crystal and you can program it to do what you want. So if I was doing this project, I'd start there myself. With that chip you can even get cute and implement a serial interface for streaming, testing or DFU .. or anything else you like.

i think I have a D11 eval board somewhere, might even have come with the BTLC1000 module (which is Atmel's BLE chip) which I've still not got around to actually using.