@bert smith
You are right there is only a small increase in size of the two map files
5.15 GB (5,538,578,432 bytes) 2022.10
5.22 GB (5,608,767,488 bytes) 2022.20
but depending on what device you have all the additional files also increase too, most probably over the threshold.
Garmin Express will normally manage your space and give you options including an SD card if inserted, or it will give you regional options.
Spoiler: Example
RibArK6