How do I actually organize a bunch of different transfer sample papers for my college app portfolio without losing my mind?

I'm a high school senior trying to put together a writing portfolio for my college applications, and I need to analyze several transfer sample essays for a scholarship requirement. I've downloaded a few PDFs from different university blogs, but they're all named something random like 'document123'. I've tried using basic folders, but I can't tell which samples are for community college transfers versus four-year ones. Can someone suggest a way to track these sources and their key points before my October 1st deadline?