Though there are definitely times you should throw out old frozen meat, If you're storing raw ground beef in the freezer, then it will have a shelf life of 2 to 3 months before the quality changes ...

“The longer it’s frozen, the less it will taste fresh. I shoot for six to nine months, but up to a year is usually good. I’ve found meat in my freezer that’s up to two or three years old, the quality ...