USB sticks are a set of fifteen known collectibles spread across Los Santos and Blaine County in GTA Online, pulled from the game's own files. Collecting them unlocks new audio tracks you can play through your Nightclub. Each one turns up in an odd, half hidden spot, tucked behind a vending machine, on a windowsill or dropped in an alley, rather than sitting out in plain view like some other collectibles. Three further sticks exist on Cayo Perico, but this page and its map only cover the fifteen mainland locations it tracks. Since the reward is a set of tracks for your own club rather than cash, this is a hunt worth doing once you actually own a Nightclub to make use of them. It rewards players who already spend time exploring Blaine County's back streets rather than sticking to the main highways.
The game files do not record a completion total for this set, so treat these as known locations rather than a finished list.
Several sit inside interiors and below street level, so check basements and back rooms as well as the obvious floor space.
The community companion for Grand Theft Auto VI. Database, maps, guides and tools for Vice City and the state of Leonida.