My USB does not recognize mp3 - Samsung YP-U3 MP3 Player

You may not have the right software on your computer for your USB device to be recognized. You may need to update your driver software. Click "Start" on your taskbar menu and go to the "Control Panel". Under "Security" click "Check for Updates". If updates are shown, click "Install Updates" (some updates may require you to reboot your computer). If this does not work, click the "System & Maintenance", in the "Device Manager" group, click "Update Device Drivers" (Windows will pop up a window that says it needs permission in order to continue, click "Continue". A tree map will be shown with different devices on your PC, choose "Universal Serial Bus controller". Choose your device and click the "Update Driver Software" icon (the third to last icon on the toolbar). If you want, and I would suggest this, click on all of the devices you see in that group and update all of them. If that doesn't work, you might have to register your product online first, then try connecting your USB drive to your computer. Remember, your OS (Operating System) must be compatible with Windows 2000/XP/Vista or newer.

Hope this helps