The garage is too close. What if a 747 crashed on your house? Or a meteorite? Or Uncle Kim's Long Dong warhead? It does happen, you know! You should store another (mirror) copy of that backup set at least 10 miles away. That's what I got, and I physically rotate 'm once a month. It's really the old Grandfather-Father-Son data security and backup plan we already used in the sixties!