I spent over a solid hour just sorting through my downloads. They are all in correct folders now, some deleted (pics for posts I made, some random things I thought I needed but don't, etc). Even my mind feels more tidy now!
On to my other folders/files now. I made a checklist which helps the reward center of the brain, checking off each task upon completion. I am actually experiencing exhilaration from this, because it is years worth of clutter that I am fixing/tidying, and it will benefit me permanently. Of course there will be more clutter after some time, but the main bulk of it all will be tidy, and I will make sure to organize the new clutter sooner, rather than wait some more years.
And then I will put them all correctly onto my external hard disk