I should have had a backup in any case, but I didn't actually know I was "using such a risky feature", to be clear. It was quite a while before I understood wh

I should have had a backup in any case, but I didn't actually know I was "using such a risky feature", to be clear. It was quite a while before I understood why my tracks in iTunes had been replaced by the Unknowns, and "iTunes moved rather than copied all my files" was not my first assumption.