Expose folder/partition on internal storage as USB peripheral mass storage device

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Doug Kadlecek

May 3, 2021, 10:23:54 AM5/3/21
to android-platform
I am trying to create a way for a user to copy a file directly to a device without seeing the entire file system. Ideally, I would expose a FAT32 partition on internal storage and when the device s connected to a computer via USB cable, a user could see the partition and write files to it (aka a USB Flash Drive).

Is this possible? It's unclear to me how this would be setup via AOSP (note we are using Android 6 as our base for the device). Would this be accomplished at the Linux level? We also would want to disable MTP, but I already know how to do that.
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