I know this is periferal to this forum, but I'm stuck, not so much as how to get the files transferred, but as to WHY this particular thing happened. Sessions were recorded on Sonar to PC because of the good piano at the studio. Files were then changed to AIFF files in Wavelab 5 and successfully transferred via an FTP site. Problem: files of 1 gig or more weren't transferred for some reason. We didn't have an open computer to let the files upload for the time needed, so I copied the files (creating a data DVD in Wavelab) and sent them to the mixing/mastering engineer. He has ProTools on a Mac, and couldn't open the files. He could see them as AIFF files of 1.6 G, but when he tried to open them, ProTools gave him a "QuickTime Files: can not open" message. I'm very puzzled. I've not had this problem before in sending discs of WAV files to a ProTools session. Just added his message to me: "i can see the file and it's called an aiff file, and i can see all the info--how big it is, the date it was made, etc, but nothing recognizes it. it appears to be a quicktime file--it has the quicktime icon, but quicktime gives me an error message saying "can't open this movie". for some reason it thinks it's a video file. maybe something about putting it on a dvd rather than a cd is causing some automatic video mode to be used. if they're small enough files to fit on a CD, even if it's just one per CD, try that.'