Most of the time People Have 8 GB USB but due to shock or mostly due to booting an ISO(Linux) image on it there USB memory space comes to 2 or 3 GB , so don't worry about the memory loss , i am going to tell you how to Recover that loss memory space back ...... just stay tuned
1) Download this Utility tool

2) Extract it through win rar.
3)Right click on autoFormat and run it as administrator.
4) Auto format utility will be open now select the drive in which your flash is on your Computer
5) Select CF and Optimized Format , click OK on the message box
and
6) Click on Format
Note: If you got some problem in format , then Try Complete Format.
If you are have some problem in this tutorial OR any other tutorial , comment on this blog
OR
reach me on Facebook : Mudassir Hassan Khan
1) Download this Utility tool
Auto Format Utility (Size : 325 kb)
2) Extract it through win rar.
3)Right click on autoFormat and run it as administrator.
4) Auto format utility will be open now select the drive in which your flash is on your Computer
5) Select CF and Optimized Format , click OK on the message box
and
6) Click on Format
Note: If you got some problem in format , then Try Complete Format.
If you are have some problem in this tutorial OR any other tutorial , comment on this blog
OR
reach me on Facebook : Mudassir Hassan Khan