Rotational play and travel worlds

Thank you both for the explanations. The reason why I said this was that, when I played, my largest viable savegame happened to be 999,990 kB large, and when I did something like pick a flower, the game wouldn't save. Probably just a coincidence. I also had a mangled nhd file that was cut off at exactly 150.000 kB, which also looked weirdly exact. Then again, correlation doesn't mean causation, as I've learned often enough, so thanks for the input. That lets me travel with much more confidence.