Large and important project, all my own assets, will not download

I have put together a long but simple slideshow. All my own digital images with in and out animations with a starting and ending text.

It will not download in any browser I have used. I have tried all the usual clear the cache and cookies, etc.

I have a solid connection and over 100 mbps download speed.

After many hours on this project, it won't compile and download. It always does the same thing. Goes to 20%, stalls, and then I get the standard Download Failed, try again, message.

I have to get this fixed and working. If there is some product I can buy to transfer this to that actually works, that would be an option.

Help.