shithub: lwext4

ref: c5db565ba94c5624f99f127fc9ee6dabf57ca4d4
dir: /demos/stm32f429_disco/stm/usb_host/Class/MSC/src/

usbh_msc_bot.c
usbh_msc_core.c
usbh_msc_fatfs.cx
usbh_msc_scsi.c