Used space : 0 MB, Free space 0 MB. No response getting even after formatting, and you are going to throw your pen-drive.. ?? Just stop..!! This is a simple problem can be solved easily. It is generally caused due to misconfiguration of USB storage device.
I have a very simple solution for this. Follow these following steps.

1. Open Command prompt. You can find it at

   All programs > Accessories > Command Prompt



2. Give command

   DISKPART

3. A new window will open having prompt as DISKPART
4. Further you have to type all the commands in this new window only.


5. Give command 
   

   list disk

   and press Enter. It will show you the list of active storage disks.


6. Give command

   select disk #. 

   Here # will represent the disk no, showing in the list. After using this command, it will show a message that the particular disk has been selected.


7. Give command

   clean

   A message will appear stating that DiskPart succeeded in cleaning the disk.
   
   
8. Give command

   create partition primary

   After this a message will appear stating that DiskPart succeeded in creating the specified partition.


9. Give command

   select partition 1

   A message will appear as Partition 1 is now selected partition.


10. Give command

    active

    A message will appear as DiskPart marked the current partition as active.


11. Give command

    format fs=fat32. 

    It will format the selected storage device ie, your pendrive.


12. Give command assign. A message will appear stating that

    DiskPart

    successfully assigned the drive letter or mount point.


13. Give command

    exit

    This will close this window.


14. Now you pen-drive has been recovered and you can use it normally.

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