When storing a deflated paddleboard, it's important to rinse and fully dry it before deflating and rolling it up. It is important to keep it somewhere dry, out of sunlight, and free from extreme temperatures. It's also possible to leave the board inflated for convenience if it doesn't need to be transported or used frequently. If used seasonally, it's OK to deflate for those times of the year when it's not used often, but it's technically better not to leave it tightly rolled up as that may cause hard creases that can create weak points over time.