3 seems like a minimum to me. Power, mouse (yeah, bluetooth, but the only ones I like require a dongle), and phone. My current laptop has two USB ports, and i

3 seems like a minimum to me. Power, mouse (yeah, bluetooth, but the only ones I like require a dongle), and phone. My current laptop has two USB ports, and it covers about 99% of my needs, but it's also frequently full.