iPhone - How to delete all photos except favorites
As it says above: How to delete all photos except favorites on an iPhone?
The answers I find online and in this forum don't seem to work anymore as there is no longer, it seems, any easy way to select all photos.
The method I see in lots of places online and in this forum is:
1) hide the photos you want to keep
2) select all the others
3) delete them
4) unhide the hidden ones.
Step 2 is where this seems to break down in 2020 when you have a phone with thousands of photos. You can go into an album and press select, and then select all and delete them. However, there are thousands of photos that are not in any album. In Recent for example, when you press 'select', 'select all' does not appear.
Thanks!