I have had a hell of a time with this. Basically I think I loose the session due to a time out issue or tmp folder FULL issue. Not really sure.
Uploading smaller files is not an issue with my scripts 25-75 MBs but anything over 200MB breaks. Weird thing is I use to be able to upload up to 400MB files but something change I think over at Mosso.
I have started to look into the cloud file API but I think I will run into the same issues...
Anyone have any experience with something like this?
I guess I should add that I am using PHP to script with and this is a cloud site not a cloud server.