The folders “Sheets”, “Others”, “Preesentations”, which Symbian S60 3rd on the Nokia E-61 and other such “Smart”phones creates and irritatingly prevents their deletion can be removed by going into “Connections”, “Data cable”, selecting “Data transfer”.

Connect to PC or whatever and change attributes to SYSTEM, HIDDEN (use for instance Total Commander to do this).

Done. Enjoy less clutter and Nokia imposed folders on your Symbian!