I use Lightroom Classic but I have 100 gig stored in the Cloud - what/where is it?

Might seem obvious but I use Lightroom Classic and yet I have 107 gig in the Cloud and I can't for the life of me figure out what it is. It doesn't seem to be from smart previews as those don't seem to make the usage go up.

How can I find out what it is/where it is? I went on adobe.com and found my files but it only shows some pdf scans from the ios scanner app.

[Title changed by moderator for clarity. 'Lightroom CC' is not an abbreviation for Lightroom Classic. It's an old name, officially no longer in use, but still often used for Lightroom desktop, not Lightroom Classic]