Hi Norma, if they are 0KB they are most like container files. E.g. one of them looks like an empty database. Chrome creates these automatically, and if they’re empty then they’re not storing any data.
There are other container files that are rebuilt with default data, which does take up a very small amount of space. Since this isn’t personal data, and since it’s needed for the application to run, we don’t consider this junk.
We have had some discussions internally about how to make it clearer to customers that CCleaner has performed a clean correctly and what these leftover files are all about.