I have a 17 minute video, it fails to compile during local exports EVERY SINGLE TIME, in any format.

For whatever reason I cannot export this project to my PC, or even directly put it on YouTube. It's too large to save on a flash and move it somewhere else. I always get to the very end of the progress bar on exporting/rendering and it gives me a message saying the compiling failed, "Unknown Error." I've tried exporting this for hours across multiple formats and it is infuriatingly vague, leaving me no clear answer or general guidance. I was able to save a 4 minute snippet of the project just fine, but the next block of 4 minutes failed.