How Many Photos Can I Add to an Image Gallery?
There is no limit to the number if images you can add to an image collection in Website Builder, but the amount of pictures you add can change the performance of the page.
For example, if you added 1,000 pictures to your image collection, the load time might take a few minutes. And the quality of the page might degrade to accommodate that many images in the space.
For more information, see Adding Image Galleries in Website Builder.