Ubuntu Server - Error adding videos/large files to file server?

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http://serverfault.com – I am using Ubuntu Server 12.04's default file server on a local area network. I can view the server from my windows explorer and can add files. I just tried adding a pdf file to the server and it worked fine. However, I was trying to add a video file and the file wouldn't copy. Is there any sort of default file size limit? The video file is 1.3gb but the server holds 100gb. The error is: "There is a problem accessing Z Make sure you are connected to the network and try again" As I said, immediately after I can add any other file, just not video files... Any suggestions? (HowTos)