Using this Topeak trunk bag is easy. First, decide how you want to attach it. You can use the straps to secure it to a rack, or if you have a KLICKfix® / Racktime® Snapit or Vario Adapter, use the integrated plate for a quick installation. When packing, use the divided main compartment to organize your things, and expand the side panels when you need more space. For the rear water bottle holder, just place your water bottle in it. As for maintenance, clean the bag with a mild soap and water after use, especially if it gets dirty or wet. Store it in a dry place when not in use to keep it in good condition. Also, check the straps and the integrated plate regularly for any signs of wear and tear.