Here is a bit of a guide on what to attach to your car when you need that extra space. They need carrier racks but if your car doesn’t have one, there are car clips available in your local automobile accessories store. These babies can be hooked to the ledges on the sides of your car. There are also carriers that already have special straps that can be attached through the inside of the car.

Car back carriers are large cargo bags that can be hung from the luggage rack. Good news, they are easy to load. Bad news, they won’t work with sedans and are of use only to wagons, vans, and SUV’s. Afraid they’d be in the way of your vision when driving? Don’t be. They hang under the rear window.

Car-top carrier bags are basically the same as the one above. The only difference is that they are attached by straps to the rack on top of your car. Choose carrier bags that are UV resistant and waterproof. The only downside to this is that you have to pack them full so they don’t flap in the wind.

Car-top baskets can be tandemed with carrier bags as they offer more flexibility. The basket offers a sturdier base while the top bag offers ease of loading and unloading.

The most expensive rooftop carriers are rooftop boxes. They are very sturdy, very durable, and very easy to pack; but you have to consider a lot of factors before attaching this accessory to your car. First you need a luggage rack with special bar systems on your vehicle before you can put the box on top. Next, will you leave it on top of your car or do you store it when not in use? Then you have to make use of a net to hold the stuff in place so it will not rattle inside the box.