simulate a USB flash drive

[LilZhang]

I apologize if this is not the right place to ask this question.

I want to use the app to simulate a USB flash drive or an external hard drive and write a small txt file to it. However, it doesn't seem to work properly, as the computer still recognizes it as a mobile device.

If I select the hid.keyboard option in the app, the computer recognizes it as a keyboard.

Could anyone advise me on how to configure it?