If the loaf is unopened, DO NOT FREEZE it as the quality will be decreased. Instead, store it at refrigerated temperature (38 to 45F). The cheese should last for about 40-days. Once opened, it is suggested that you use it within a week. OK, if you freeze it the cheese won't melt down into a toxic puddle, but it will be impacted in terms of flavor, texture, and melt when you use it on a pizza, thus negating the fine quality characteristics of Grande Mozzarella cheese. I've frozen it, and if you're not overly fussy, it will work OK for you, it won't win you any competitions, but it will satisfy your taste for a pizza now and then over the next 3-months.
Tom Lehmann/The Dough Doctor