Hi,

By default, WordPress generates 4 thumbnails:

• Thumbnail
• Medium
• Medium-large
• Large

And all the options you uncheck is an extra image size of Soledad. If you want to disable all, please install the Stop Generating Unnecessary Thumbnails plugin, this plugin helps you remove all image sizes of the theme, plugin and WordPress core.

If you want to remove all unnecessary image files, you can install and use the Media Cleaner. This plugin will scan your website storage then show all images size that has been generated but is not in use.

Regards,
PenciDesign.