Things you most need to back up

I have a home network with six computers, most of which are used for work. I've never had much trouble with losing data even though I don't use any kind of rigorous back up system. My preferred method of backing things up is just to make copies of important folders and store them on a network drive. I frequently change out hard drives and do a clean install of the OS if anything seems the least bit out of kilter. I would do that for instance if I found any virus or malware (almost never happens). I just put the old hard drive on the shelf in case I want to get something from it later. My primary application I'm running has it's own backup utility which is just for backing up files that I have created using it and some settings.

I don't care about backing up software since that can always be downloaded and reinstalled. I don't want to restore anything from a disk image or anything remotely like that. Here are the folders I make copies of so I can recreate my files if needed.

1) Every thing under C:\Users
2) C:\Windows\System32\DriverStore
3) Any files containing important data which are stored under the program folder.

Is there anything else I should be doing or am I just overlooking a way of doing this that would be vastly easier? I used Carbonite for a while, but finally decided I probably wouldn't be able to figure out how to restore something if I actually needed to.

You could certainly use an "automated" application designed to backup ONLY specified folders. You could include or exclude subfolders and certain file extensions as you see fit.

You'd select the destination--presumably somewhere on your internal network, rather than the dreaded cloud.

I assume you have no interest in backing up your Windows installation per se.

Regarding your category 3: what are some examples that you back up from this category?

All I personally back up are emails, bookmarks, and EVERYTHING on my D (data) drive, where I make ALL saves. This would include uninstalled versions of apps I use, since I don't know that they will always be re-downloadable. I separately make an image of my C drive, but I never restore individual files from that image.

I assume anything that you might call "personal data" is under C:\users somewhere?

I've heard of people backing up drivers, but I don't do it personally.

Ok, thanks everyone.