The launch model of the original PlayStation 3 included four USB ports.
Sony’s first PlayStation 3 models placed four USB 2.0 ports on the front of the console. They supported accessories such as controllers, keyboards, headsets, cameras, and other compatible USB devices. This was especially useful because the system’s wireless controller could also be connected and charged through USB.
Later PlayStation 3 revisions changed the port count. The slimmer PS3 models generally had two USB ports, so the answer applies specifically to the original launch-style hardware rather than every PS3 model.
Another common confusion involves the console’s card readers. Some early PlayStation 3 models also included slots for Memory Stick, CompactFlash, and SD media, but those slots were separate from the USB connections and were not present on every version.