deleting duplicates from photos on cloud
I have more than 24,000 photos on the Cloud. I have the smaller copies on my MacBook Pro. I want to delete lots of them. I have been told that I need to delete them on the Cloud to ensure that they are gone. I am looking for an app or shortcut to
#1 identify duplicates
#2 identify very similar photos
to reduce the overall numbers.
Can you please tell me the best way to do this. I'm ok with a 3rd party app if that will help.
My second problem is that I have lots of selfies in my photos - produced by my darling grandchildren. It would help to be able to identify them but the Cloud Media Album doesn't include that option while the Media Album on my computer does. But if I delete them on my computer it won't get rid of them on the Cloud. Help please!!!!!
MacBook