The subject file appears to download properly according to the progress bar in the notification.
Once the download is complete it starts trying to unzip the file. At this point it spins for a VERY LONG time before eventually failing. The message while it is spinning says:
"Unzipping, It can take a lo…"
This process works with a 25MB file but fails with a 400MB file from the SAME website and method.
Any clues as to what is going on or how to troubleshoot further?
Your smartphone isn't as powerful as a computer. Well, I think you should use a third party app like Winrar or ES File Explorer Pro to unzip large files if the stock downlod manager is giving issues. You can checkout the best RAR ZIP archive apps for Android here.
If you can't get it to work on very large files, I would suggest you use a computer.