Big albums with more then 100 pictures

No, this cannot be done, and is not planned to be supported either.

The reason for this is rate limiting on Google’s part. Google has very aggressive quota limits, which get breached easily if you automatically try to fetch all photos – each bunch of 100 is a new API call, and since the photos cannot be cached, every visit to your page(s) at 30 minute intervals triggers new API calls.

Additionally, users on this forum have posted that their API key was shut down due to a violation of the ToS – if Google senses that you are trying to use your API key / Client ID to build a proxy of Google Photos, they disable the key.

So, while not great for UX, the current approach is really the most practical one out there.

Thank you very much for that really quick response. That was really quick. I really appreciate that (donation done??)

But just to summarize:

that means that it is usually better to always have a text element for the “show more” button and always to limit the maximum amount of pictures up to 100 (I thought that this is more optional) because it could always happen that the album probably gets more pictures later on.

Is that understanding correct?

Yes – your understanding is correct. You could always set your count to 100 and define a more button. If your album has fewer than 100 photos, the button will not show up. If it has more than 100, the button shows up. In any case, if you set a value > 100, the count gets automatically capped off at 100.

The primary reason why there is no default setting for the more button is that there are several cases where users post photos frequently, and they just want to show the latest few photos.