I just googled all kind of stuff to figure out how to connect my niece's rant to my computer. All I kept getting was the Found New hardware wizard. Samsung and sprint websites dont show any usb driver. But I figured it out...
I assume that you found the Connect to PC feature on the phone.
For those new people looking at this question, hoping to find an answer, heres how you get to that step.
After plugging in the phone, it will pop up a found new hard ware wizard. CANCEL IT OUT. You don't need this and you will eventually be able to bypass it.
1) The next step is to go to the phone, look for the symbol of a little house inside a yellow box (Page 111 of your owner manual). Press OK
2) Scroll down and highlight Tools and then hit OK
3)Scroll down to Mass Storage hit OK
4) Highlight Connect to PC hit OK.
It should now say Connected to PC, call disabled.
If you dont have Connected to PC, call disabled, then hit Connect to pc again. Sometimes you have to do it 2-3 times.
Sometimes it will pop up the Found New hardware wizard during the above process. If it does, just keep hitting Cancel.
You're all set.
On your computer, click MY COMPUTER
You should now see a new "hard drive" listed in there. It will say E: Removable Disk (or possibly another letter, but it will say removable disk on it).
You are now viewing everything on your MicroSD card thats already inside your phone.
Now double click on that in My computer. You'll see a folder inside there called Music. There is where you copy (or drag and drop) your mp3 music into.
Hope this helps, I spent an hour trying to figure this out myself =/