Looks like a bandwidth issue for the first take, anyways sometimes it might be due to file hashing of the previous dats available at your HTTP repository.
Try clearing the the temp files of that HTTP repository server and then run the task. Hopefully it can run.
IT looks that ePO is not downloading the file, as yogi derek told you should check that you have enoughfree space on system drive or check if you're using disk quotas.
If you need a proxy for ePO to be able to browse to internet check that everything is OK under ePO proxy settings