chente - I've made my peace with this. Suppressing my 'completist/perfectionist' tendencies after having discovered the dangers of a misplaced space in the command line instruction to delete a folder, I'm good.
The drive will get formatted at some stage in the future and the problem will be gone. In the meanwhile, if I don't look, it's not really there .
Appreciate your help.
I will do the same. The folders that I don´t need are empty and the risk seems to be to high for deleting empty folders.