After several months of trying, I am not able to use this app. I just don't understand why when you're asked to backup device folders, it doesn't actually backup device folders, just the images within the folders. I have over 20,000 images in Google photos, and bar the first 30 or so, I couldn't find any others that I am looking for without spending 30+ minutes searching in such an inconvenient and ultimately pointless backup solution. I am genuinely regretting purchasing Google One storage.