 <p>Two possible answers:</p> <p>1) The traditional way to check for a file on an FTP server is the SIZE command - if you get a size, the file exists, otherwise you get an error and you know it doesn't exist.</p> <p>2) Found some code that demonstrates a possible way to do this:</p> <p><a href="http://stackoverflow.com/questions/5823475/get-file-size-on-ftp-download">Get file size on FTP download</a></p> <p>Hope this helps.</p>