my save folder is over 5 gb, i use ntfs compresion of files to keep this smaller (it reduce size, alot) i keep my most succesfull characters (with worlds) what i am bored off in hero-charactername.zip outside of save folder, one of my characters had 10000000+ bionic power BEFORE power changed that power storage give 250 not 10 power, skyrocketed spawns in labs give a lot of power storage from all those sciencists and bio ops (but had no death mobbile, his vehicle was foot crank powered van)
basicaly is my only succesfull character, all others what did that good or even better died to stupid ways, like one of my characters jumped out of seat in his vehicle and one of internal walls bashed him to death when he was lying stunned on internal floor (because fuck logic) and save scumming didnt helped much
after update anyway my second character on that world found that vehicle and base but getting car into reality bubble=instant crash (only able to use debug teleport to move around it) so i deleted this world
mostly i create new world after character die but sometimes i do not do it
i explore but not too much, i loot everything
i explore after i make good vehicle with basic crafting and cargo space to find places like refugee centers and labs