from usbd_msc.h:86
typedef struct
{
uint32_t max_lun;
uint32_t interface;
uint8_t bot_state;
uint8_t bot_status;
uint32_t bot_data_length;
uint8_t bot_data[MSC_MEDIA_PACKET];
USBD_MSC_BOT_CBWTypeDef cbw;
USBD_MSC_BOT_CSWTypeDef csw;
USBD_SCSI_SenseTypeDef scsi_sense [SENSE_LIST_DEEPTH];
uint8_t scsi_sense_head;
uint8_t scsi_sense_tail;
uint8_t scsi_medium_state;
uint16_t scsi_blk_size;
uint32_t scsi_blk_nbr;
uint32_t scsi_blk_addr;
uint32_t scsi_blk_len;
} USBD_MSC_BOT_HandleTypeDef;