Features:                                                                              Supports hot plug & play, High speed USB 2.0 port No physical drive required Plug-and-play; no external power supply required, USB bus-poweredSupport all current computer systemsspeeds vary depending on types of file being transferred and computer configuration.Read Rate: 12Mb-18Mb/S    Write Rate: 4-6 Mb/SInterface USB 2.0Excellent USB Memory stick in excellent condition
About capacity:                                                                       4GB=approximately 3.6GB-3.8GB8GB=approximately 7.4GB-7.6GB16GB=approximately 14.4GB-14.8GB32GB=approximately 28.5GB-30GB64GB=approximately 58.5GB-60G128GB=approximately 120GB-122G