Okay I feel like a total noob. But I have been trying to just completely wipe the internal "SD" memory of my Galaxy Nexus... without success. I try to delete the folder separately after mounting but it's so slow and keep freezing.
I'm running MoDaCo ROM and it's also rooted. So I did format everything that I could format in the bootloader. The internal memory survives everything, including wipes and new ROMs etc.
Please help. I want that memory cleaned