Surprise when I open the dropbox account afterwards: only a tiny amount of my files are actually available. I wonder what went wrong?
How did you use Dropbox to do this? Did you install the Dropbox desktop application on both computers? If so, did you wait for Dropbox on the old PC to finishing syncing the files to your account and say that it was up to date, after you moved them into the Dropbox folder? When you sign in to your account on the Dropbox website, can you see all your files?