This part is for the older Core and has not been updated for Photon and Electron. Part of the reason why is that Photon and Electron use a modular building strategy and so the amount of memory used for code is a combination of the user code and the 2-part (or soon 3-part) modular system firmware. Both Photon and Electron have more code memory available and the problems that the data help you with on the Core are largely not a problem any more.
Well, that’s a relief. I upgraded from a core and the build experience and wifi reliability have been great… I just happened to notice this and got worried I was just about out of space.