This is not about not being able to upgrade from 12.10 to 13.04, its about whether upgrading will wipe hard drive or mess up other personal settings.

I've been thinking about upgrading my computer from 12.10 to 13.04 (mostly because of my shutdown issues) but been a little bit skeptical. Does upgrading wipe your hard drive? If it doesn't, does it mess up your personal settings?

If anyone has anything to help me, please do so ASAP. I want to know whether or not I should/have to back up my computer on an external hard drive first.

Thanks in advance.