Symptoms : Pen drive / flash drive shows less space than it actually have. Like 4GB pendrive shows 1GB and 6gb shows 2 gb.
Cause : Installing operating systems like Chrome OS 19 force pen drive to corrupt.
Solutions:
1) My Computer>Manage>Disk Management – Delete partition and repartition.
2) Use HP Flash Drive format.
Download from : http://files.extremeoverclocking.com/file.php?f=197