My question is can USB CDC be used to transfer text file from an SD card to PC the same way as we copy a file from a USB Flash drive?

[Khairul Akmal Zulkepli]

I try to make a data logger, I'm using STM32F407 DISCOVERY and store the data into the SD. I have to use the USB port for communication between STM to PC for logging status. Eventually, after recording, I want to download the file the same way we copy a file from USB Flash drive.

[Tesla DeLorean]

That would be a USB MSC

[Khairul Akmal Zulkepli]

Hai, Thanks, if I set the USB to MSC, then I will lose the CDC function right?.. It is possible to interchange between both in the same USB port?