Your question isn’t ridiculous at all. In fact, I’m certain it’s one reason so many people don’t back up: they simply don’t know how.
For something as critically important as backing up, that’s more than a little scary. I hear from people who’ve lost important and valuable information all the time. Whether it’s from malware, hardware failure, account hacks or other disasters, a backup could easily prevent such loss.
First, let’s look at what it means to back up a computer, and what your options are. Then, I’ll share some guidelines and tell you what I recommend for average users.