Specify how many threads are used to transfer the data. The number of threads is the maximum number of parallel working threads.
If the program is running on a maschine with slow hard drives, a smaller number of threads may improve the transfer rate. If the round trip time to the ftp server is large, a larger number of threads does improve the transfer rate.
A threads read the file in blocks. Blocksize is the size of these blocks. A larger reduce the I/O load. A smaller number reduce the memory consumption of the program. The memory allocation is threads * blocksize.
Write log to this file. Logging is disabled if this field is empty
Select the language of your choice. Any change of the program language becomes not active until restart.