I solved this problem by setting timeout to 0, and disabling router signal booster (because pc was connected via WiFi). But in the end the file was uploaded successfuly, and the hash is matching (no data loss), despite two error. How is that possible?
10632 2 Error: Connection timed out after 20 seconds of inactivity
10632 2 Error: File transfer failed after transferring 2 204 631 040 bytes in 686 seconds...
........
10632 2 Error: Connection timed out after 20 seconds of inactivity
10632 2 Error: File transfer failed after transferring 189 005 824 bytes in 255 seconds
10632 2 Error: Connection timed out after 20 seconds of inactivity
10632 2 Error: File transfer failed after transferring 2 204 631 040 bytes in 686 seconds...
........
10632 2 Error: Connection timed out after 20 seconds of inactivity
10632 2 Error: File transfer failed after transferring 189 005 824 bytes in 255 seconds