General panel page-load behavior

Hello, I’m interested in using a structure field to allow a client to manage a list of documents on a single page. Let’s say the client added 50 PDFs and they’re about 1 MB each. When the client goes to edit the page in the panel is the panel downloading all the files/PDFs? I hope not and don’t see why it would, but I’d like to confirm this with the good folks here in Kirby town.

I don’t see why the Panel should download those files? Have you ever seen that happening?