Specifications

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The example that we use to introduce the system customization is a usb
gadget simulating a usb mass storage device:
1. Select Device drivers
Symbol: USB_FILE_STORAGE [=m]
Prompt: File-backed Storage Gadget
Defined at: drivers/usb/gadget/Kconfig:713
Depends on: <choice> && BLOCK [=y]
Location:
 Device Drivers
 USB support (USB_SUPPORT [=y])
 USB Gadget Support (USB_GADGET [=y])
 USB Gadget Drivers (<choice> [=m])
2. Select the following option: (File-backed Storage Gadget).
3. Select “exit” until the following is displayed.
Select ”Yes”.