Welcome to Justanswer.com, my name is ***** ***** I will do my best to assist you. While there are programs that can help with scenarios like this, my opinion is its better to do it manually, and do it right.
For that reason, I am sending you an offer for our secure remote assistance. With that, I will be able to connect to your screen from here and manually help you move your files, and remap your folders to point to the new external drive so we can free up space on your internal drive.
And once thats done, I will also run through some manual steps to try and repair and speed up the machine.
Once this offer is accepted or rejected, we can continue.
Ideally, what we would want to do is create a new downloads folder on the blank external hard drive. ( as well as pictures folders, music, videos, documents, etc )
then copy everything over from your internal hard drive, to the external hard drive.
And then, map those folders so t hat anything you place in downloads, documents, pictures etc, automatically goes to that location on the external hard drive, instead of filling up your internal hard drive.
As far as your folders and pictures needing finding and sorting, whose computer doesnt need a bit of spring cleaning and organization?