Project size is too big, how can I save memory?

Purchased them from the unreal marketplace, I will get some screenshots of the material graphs later today. Most of the textures were 4096x4096 but I adjusted the LODBias to reduce them to 1024x1024. I did this for every single texture (I got errors when loading the project initially saying the textures were too large which is why I reduced them in the first place), I can try reducing the size further to see if that helps. I just don’t understand why it shows my project upload size as within the limits in the project size window until I actually try to open it in game and it tells me I’m way over budget.