There is no advantage to lifting the car for storage, modern tyres do not flatspot, but it is a good security measure if you also remove wheels!
If you do, the suspension will fully extend to the bump stops and no harm will be done to any components, allthough its worth checking to see if the rubber boots on the CV joints are not fully stretched as they may become deformed when the cars back on the ground which can cause them to split. It has been known for balance weights to come of wheels and tyres to become deformed which causes vibrations etc. Its very unusual for rotors to rust when storage is in a garage, but, brake calipers have been known to stick (seize up) thru lack of use. When preparing to go back on the road you should pump the brake pedal while you are warming it up, then make sure you can roll the car back and forth to make sure the barakes are free before driving.

Cheers Steve