Not responding

Hi is there any chance if someone could help me and tell me what is wrong with my model My model? my model had slowed down a lot where it is impossible to work with especially for when I’m trying to save it takes so long and says(not responding) :disappointed_relieved: :disappointed_relieved:

Possibly because the file size got simply huge and can no longer be handled by your RAM/Video card/Hard disk? How big is the file?