ugen4.2: <ARM> at usbus4
umass0: <USBMSC> on usbus4
umass0: SCSI over Bulk-Only; quirks = 0x8100
umass0:2:0:-1: Attached to scbus2
da0 at umass-sim0 bus 0 scbus2 target 0 lun 0
da0: <MBED VFS 0.1> Removable Direct Access SCSI-2 device
da0: Serial Number 1021000017e0f38800000000000000000000000097969902
da0: 1.000MB/s transfers
da0: 64MB (131200 512 byte sectors)
da0: quirks=0x2<NO_6_BYTE>
uhid0: <CMSIS-DAP> on usbus4
umodem0: <mbed Serial Port> on usbus4
umodem0: data interface 2, has CM over data, has break
% sudo mount -t msdosfs /dev/da0 /mnt/
% mount |grep da
/dev/da0 on /mnt (msdosfs, local)
% sudo cp BBC-MicroBit-First-Experience-1460979530935.hex /mnt/