Multimedia console

Yes, the large thumbnails are four times larger than medium thumbnails, it will be clearer in QuMagie viewer.

Medium

Large

If the screenshot is compressed, you can refer to this

In our test environment, 100,000 photos will generate about 5% of the normal thumbnails, and the total thumbnail capacity will increase to 30% after enabling large thumbnails.

Using this ratio may take up an extra 100GB of space.

I regret not being able to answer this question, but I will help pass it on to the QuMagie team to let them know of this request.