how to write file into my android phone?

[luofeiyu]

When i input usb line with my android phone into the pc , there are two 
disks j: and k: (type :removable disk)  displayed in win7.

i can get my android phone bluetooth mac address .

import bluetooth
nearby_devices = bluetooth.discover_devices(lookup_names = True)
for addr, phoneName in nearby_devices:
     print(addr)


it is  6C:8B:2F:CE:5B:59

Now how can i write a file into the disk  j:  of my android 
phone(bluetooth mac is 6C:8B:2F:CE:5B:59 )?