title: How to detect the size and name of USB drives in Objective-c
body: <p>After using NSWorkSpace to detect how many USB drives I have, I still want to know the size and the name of the specific drive. How to get those information? I tried to use NSFileSystemSize, but seems the size I got is not the total size of the drive. It maybe just one of file size in that drive. Does someone know it?</p>
  
  <p>Thanks and sorry for my bad English,</p>