Hi guys, i have a problem with my Nokia e66. When i try to open an app such as a mobile game like tekken, it doesn't open. Also, other apps don't open too. I Google searched my problem and i found results saying that there might be a problem with the C: drive of the phone and i should try formatting it (I install almost all of my downloaded apps to the memory card). The phone technically isn't mine, it's my sisters, so some of her messages, contacts, photos, videos,etc are on it, and i know that when I format the phone, they will all be deleted. Should i backup the phone using Nokia suite, format it then restore its contents? Plus how do i format an e66. Any help at all would be greatly appreciated.