[Q] Are locally stored files sent to Google? topic

Ok let me first say I'm not trolling. I haven't been able to find the answer anywhere and no one answers me.

I'm currently looking to get back into Android and Google services after three years. But I have a question. The fact that Google uses the information I put online is all well and good as they provide a free service to me. OK.

But what about the information I keep on my phone such as pictures, documents and others that I don't sync with any Google service, does it remain on my phone or does Google come and get it?

On top of all what we hear about Google, the real and the urban legends, I read the Privacy Policy and this part bugged me:

Quote:

Local storage We may collect and store information (including personal information) locally on your device using mechanisms such as browser web storage (including HTML 5) and application data caches.

Application data cashes? Does that include the image roll cache for instance?

Thanks!