| To do a quick format go the the left in the PSP's menu, then down to 'system settings', select it, then down to 'format memory stick'.
To do a full format, connect your PSP to your pc, right click its drive letter in my computer, choose 'format' and press start without changing any of the options.
You may then want to do the quick format on the PSP itself to create the default folder structure again. |