So your computer uses a standard 2.0 USB that's what one end of the stick will be. The 3.0 USB port or drive will transfer 10 times faster than your 2.0 USB. The 3.0 USB can work with 2.0 with no problem but it will not transfer at a 3.0 USB rate it will downgrade to the 2.0 USB speed. The Micro USB is what most Android phones, tablets plus a lot of other small electronics use to power their device and transfer files. So if you have a Android phone or tablet this device will make it very easy and quick for you to transfer from your phone onto external storage without having a cord connected to the computer and you transferring files. It's a flash drive for your phone/tablet!