server_name = '192.168.168.12'
conn = SMBConnection(username=username, password=password, my_name='waldi2'
                 remote_name=server_name, domain=domain, use_ntlm_v2=True,
                 sign_options=SMBConnection.SIGN_WHEN_SUPPORTED, is_direct_tcp=True)
connected = conn.connect(server_name, 445)
# obtain a list of shares:
Response = conn.listShares(timeout=30)  # !!!working, shows e.g.('  Share[', 20, '] =', u'JBW_in')
os.path.isdir('//192.168.168.12/JBW_out/')    # is False with android, True with win7 !??

shutil.copyfile('/sdcard/waldi2_0/data/stop.txt', '//192.168.168.12/JBW_in/stop.txt')

[Errno 2] No such file or directory: '//192.168.168.12/JBW_in/stop.txt'