@ralph when i press download into new folder (pymakr VS configured on COM port) all files are downloaded but 3 of them cannot be downloaded tried many times with reset, disconnect ... Downloading 3 files... [1/3] Reading lib/sensor.py Failed to download lib/sensor.py [2/3] Reading lib/konfig.py Failed to download lib/konfig.py [3/3] Reading lib/GPS2.py Failed to download lib/GPS2.py this is how it looks like in Filezilla: Do you have any concept what can be wrong? - because e.g. file sensory.py is quite small name is also in lower letters without numbers - nothing special. konfig.py is really small file 696 bytes... I can of course do this by Filezilla but..