Asset Download Failure

When updating and or downloading new assets (I have way to many of them) often the download percent will stop during the download, and a few minutes later it says Error. Clicking the download button again starts the download over. With large files, this can take many hours and many tries before successfully completing the download. I had one asset, around 1.5gb, it hogged somewhere around 15gb bandwidth before I finally got it to complete. Searching the forums, I find that it may be only happening to me, but reading asset comments indicates it happens to a real lot of people. If unity pays for server bandwidth, etc, fixing this will likely drop your server bill a huge amount. It will certainly drop my internet bill since I have to pay for bandwidth thanks to att. What is making this happen? Nothing more on my end I can do to minimize it, but for other readers, when downloading a large asset, do not use your internet for anything until it downloads, appears to help a little bit.