31:00Drew Houston describes how personal frustration with file access led him to build Dropbox, recruit co-founder Arash, and validate the idea with a demo video and early user feedback. He explains how a startup’s needs expand quickly, why a founder’s job changes as the company grows, and how reading, mentorship, and studying businesses outside technology can help build management judgment. Dropbox explored adjacent products before deciding to refocus on collaboration, illustrating how focus can require closing products the team cares about. Houston also discusses Dropbox’s growth through activation improvements and viral referrals, and frames going public mainly as a financing and liquidity decision with operational costs.