If you want a build with more storage, you can upgrade to the 512GB model for an extra $200. It may essentially be just a larger version of the MacBook Air 13-inch, but if that's what you want ...
Apple's smallest laptop is the 13-inch version ... with 10 GPU cores and 16 neural engine cores, the laptop has a 512GB solid-state drive and now 16GB of unified memory to start.