Hi. I screwed up the backup of my life long music library of about 7000 mp3s. I was able to restore all files but 95% won't produce any sound (no matter which application plays them) although they seem to have the correct size and tags.

Could there be a tool or method to "fix" these files?

If not, does anyone know of a download service I can pay for to get unlimited downloads for a certain time period (and still keep the files)? I tried hard to find one but they don't seem to exist anymore.

I am heartbroken.