I used ClockworkMod to wipe my Samsung Galaxy SII and install Cyanogenmod 9.1 on it. However, when I mounted my phone on my computer, I see that lots of folders were left on its internal SD by apps from before I flashed my phone.
I was tempted to just delete everything on the internal HD from my computer (running Mac OS X 10.6.8), but I noticed there seems to be critical directories on it like one for Clockwordmod.
Here is a list of the directories on the internal SD via ls -a:
Are there directories in here that are essential to the normal function of the phone? A related question is: When I flash my phone, how to I completely wipe it so that when Cyanogenmod is installed, there will be no traces of previous activity as shown in the screenshot above?