USB MSC Zephyr example using SD card issue

Dear ,

I am new to the Nordic platform and started using VScode to build up and test some examples from the SDK.

I was using an nRF52840 dongle and trying to replicate the USB MSC Zephyr example but was not successful. 

To make sure I am on the right track from the very start, may I have some advice on the points below?

- Based on the tutorial video, the pin assignment and initiation are done by creating a .overlay file under the boards folder, which is quite different from what's been described here https://infocenter.nordicsemi.com/index.jsp?topic=%2Fcom.nordic.infocenter.sdk5.v15.3.0%2Findex.html  Are there any differences between the two? Are there any points that requires special modifications or changes.

- For the operations in regard to the SD card, do I need to create them by myself or it's already been handled on the background in this example?

- What changes do I need to make to the prj.conf and/or .overlay file, since for me it looks very different from the description in the above link.

Again, thanks a lot for your help.

Kind regards, Kevin

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