I hate to be a pain but My steam is stuck in offline mode I've tried contacting support but It hasn't been a year yet and apparently going in offline mode wipes your saved data. so can someone upload a save if it's not too much trouble?
I was using offline mode for steam this morning so my game did not update and all of my saves stayed and worked just fine. If you are asking about importing the Ground Zeroes save I was able to download mine in game while steam was still in offline mode.