A Removable Storage system provides two classes of media pools: system and application. System media pools include free media pools, unrecognized media pools, and import media pools. Removable Storage creates one free, one unrecognized, and one import media pool for each media type in your Removable Storage system.
Also avoid snacks with a lot of salt as salt makes you thirsty. Good alternatives to trail mix are crackers, potato sticks, grapes or raisins. Plan on having something to snack on every couple of hours on a long day hike to keep your energy level up.
What to bring on a hiking trip? Forgive me if this list seems a little obsessive and please use it as a guidline not a rule. There may be many things I've forgotten and maybe a few that aren't neccessary. From my experience the following list of items has been very useful on previous trips.