I am migrating to Nextcloud memories and move away from Google photos however my previous phones and family are linked to the Google account is there a way to compare all the photos on my local gallery to my Google photos to make sure I have downloaded all the photos from there I don’t have time to download everything from Google photos and delete duplicates
If you’re looking for a more sure fire way, don’t use the app/your phone. Go to Google takeout and download all your contents from Photos onto your computer - if you have access to one. They come in zip files, which you can then unpack and store everything on your nextcloud server.
Just be aware that, unless they’ve changed this since I last looked, when you do this it strips out all of the metadata and provides it all in a single file which you would then have to find software to write it back on to every photo (if you want the metadata that is).
Those googly-eyed SOBs! You’re right. I’m planning to migrate my photos to Ente whose upload tool fixes this, I think. But Nextcloud probably will not.