I have discovered a couple of really clever/useful (at least, I think so...) features of Google photos.
1. Type in a word in the search box (eg "bicycle") for what you want to find in all your photos, and it will find pictures containing a bicycle. Maybe not that impressive to some, but I thought it was pretty neat.
2. Yesterday, I made an album
https://photos.app.goo.gl/9RUYj7CzeFRRS3vy8 so that I could show some photos I took yonks ago, to My Mate Terry who art in Sibton. These photos were some pretty early ones I took with my Nikon D70. The problem was that they had been transferred between computers/cloud/servers several times, and the files in finder, and the clickable exif data, displayed the date 1/6/2008. For some computer-glitchy reason a lot of my old photos have had their dates changed to this.
However, the real data of origin must be held somewhere within the file in a manner that is inaccessible to Finder. Google Photos has found it and displayed it - 22/5/2007. I double checked this as I originally linked to these from ACF - of course YACF only came into existence in 2008 - and I have all my old ACF posts downloaded and in a folder. I linked to them on 24/5/2007.