Can you open and freeze fresh vac packed beef?

Generally you can freeze any meat that hasn't been previously frozen (freezing twice destroys the cell structure resulting in pour texture and flavor.) Vacuum packing simple removes any air from inside the package, which generally allows meat to keep for longer. If you plan to freeze meat, it is best to leave it in the vacuum pack, but not necessary. Re-wrap meat in a freezer bag and remove as much air as possible before sealing.