Create the first folder labeled "Band Boosters" by going to the documents section and clicking "New Folder."
Open the empty "Band Boosters" folder and create subfolders. The "Band Boosters" folder should have only other folders in it, no individual documents. Create an "Administration" or "President" folder, and within this folder create one folder labeled "Meetings" for booster meeting agendas and minutes; another labeled "Treasurer's Reports;" and another labeled "Correspondence." These are for use by the president of the organization.
Back within the "Band Boosters" folder, create new folders for each section of the boosters. For ideas, look at your committees and officers. For example, there will likely be a "Uniforms" folder, "Fundraising" folder, "Trips" folder and "Color Guard" folder. You may want a "Marching Band" and a "Concert" or "Symphonic Band" folder if you have separate committees that work with these organizations specifically.
Create subfolders within each of the committee folders. For example, the "Marching Band" folder might have subfolders labeled "Props," "Chaperones," "Contest Meals," "Contest Travel" and "Pit Crew." The "Uniforms" folder will have subfolders labeled "Marching Uniforms" and "Concert Uniforms." The "Fundraising" folder will have subfolders labeled with the name of each of the fundraising events throughout the year, including any contests or events hosted by the band.
Within each of the subfolders, store the documents for the year. For example, the "Chaperones" folder will have a document for each event the band will participate in and the chaperones who volunteered, then another document for the trip or contest chaperones, etc. If the school hosts a contest or event, the "Contest" folder will have many subfolders which contain the documents. For example, there will be subfolders for parking, concessions, traffic flow -- both human inside and vehicles outside -- judges and equipment management.
Email or transfer the basic structure to each committee chair or officer for them to customize and update throughout the year.