How to Write File Sources Using a File System?

"I was hoping somewhere there's like a list of all the different things. Let's see. So people goll lok through the docks, but also out there." "If you want to write te file sources that are not actually file sources, then thisis a really, really good one for that," he says. 'It doesn't matter if this r thetop, you know, inthe cloud, o whatever location'