@sunflower_avenue if you’re comfortable self hosting, my girlfriend has some recs (she writes open source code for libraries) but nothing that offers free hosting already, and i suspect that’s a little more involved than you are looking for?
a bookmarking software like https://raindrop.io does most of what you want for free, but you’d need to find somewhere else to put the files elsewhere and link back (anywhere that lets you publicly host files would work eg. mega.io or whatever)