Resume property will force wodFtpDLX to resume file
transfer, if possible. File transfer will not truncate
destination file, and transmission of data will continue
from the point where connection was lost last time.
If you're uploading a file, wodFtpDLX will start
from the position that is equal to the length of remote
file that already exists on the server. If you're downloading a file, wodFtpDLX will start
from the position that is equal to the length of local
file.
Resume property is pretty much 'unstable' when
dealing with TransferMode
files. It is advised not to use it in such cases.