This rack provides up to 105 cubic feet of storage and the height can be adjusted from 22 to 40 inches.
Promising review: "This product is great in my opinion. Installing it wasn’t too bad. What I also love about this product is that my garage looks way less cluttered. We don’t have bikes to hang, but we just have a lot of decorations that need to be stored away (like Christmas decorations), and it just makes our lives way easier. We also store my husband's tools on top of it. I was skeptical about the weight capacity, and it proved me wrong.
One of the reasons I considered an overhead shelf over the normal ones was because space is very important in a garage. We converted our garage into a gym. So in addition to storing our boxes, our grill, and other miscellaneous items, this shelf really opens space for it." —HelloKiwii
Get it from Amazon for $179.99 (available in two colors).