Squarespace can be frustrating with respect to adding photos as individual images. Takes a long time. Squarespace recommends limiting images to 500k. I’ve tried that, but Lightroom often tells me that it can’t make an image that size. I’m probably doing something wrong. Doing a quick, unscientific test using the quality slider in Lightroom.
I doubt anyone will be able to see a difference on a phone. Maybe not even on a computer. If so, I need to do a better job of remembering to export at about the 1 MB size. Squarespace automatically creates a few versions of the file for different devices, so that slows things down. I’m sure they also want to discourage larger file sizes in general. Man, I wonder how much storage space they have. Do their servers take up warehouses the size of Nevada? WordPress had a better photo management system. I sometimes miss it, but there were a lot of things about WordPress I don’t miss.