I want to have the MMC with the factory defaults (completely empty?).
I tried Tools>Memory>Format, the process runs successfully, it prompts for a new name for the memory, but I still have 31MB used in the MMC. I could go and remove folder by folder, but I am not sure if that would bring the MMC to its factory defaults and it's also time consuming.
I also tried *#7370# and *#7780# but it seems that those are just for resetting C: and D: but not E.