Cannot save screenshot to file

At some point in history I made some settings change somewhere to save screenshots to the clipboard instead of the default Desktop location. However, I did this somewhere else than this place:

I still most often want to use the clipboard, for instance when posting this question 🙂

My problem is that both with or without control modifier, they're always saved to clipboard. I think this is because I didn't use this setting here but something else that interferes/overrides. I currently have no way to store a screenshot without going through the hassle of creating a new file in preview to paste into… Any tips highly appreciated!

—- Update to clarify:

I have tried all the normal screencapture settings and currently have:

defaults read com.apple.screencapture
{
    location = "/Users/viktor/screenshots";
    type = png;
}

However, there is still no way OSX ever produces any files, just clipboard. This is due to the fact that I made some more obscure change some time back that was not as simple as changing the shortcut like above or these plist settings that seem to be common now. What I need help with is finding out what that was to be able to restore. It was probably 5 years or so and my guess is that the shortcut settings for this didn't even exist at the time, therefore leaving me to use something else that now overrides this…