Error 8328

I was downloading a movie that I bougnt on the iTunes store and it stopped at 3,16 Go out of 3,87 Go.

So I clicked the resume button but it wouldn't work telling me that it was an unknown error 8328 and that I had to check my internet connection, so I did and it was completely fine.

So I don't understand, what's wrong and what can I do about it?