Hi Sriram PV.
Welcome to SevenForums.
Why are you tagging on to a 3 year old thread? You could have started a new thread clearly defining your problem with full details.
1. What is the make/model/capacity of your pen drive?
2. Is it a new one? Still under warranty? If not, for how long have you been using it?
3. From the screenshot, I see that there are no files in it. If there are files, copy those a
to another media and then try to format it with HP USB Disk Storage Format Tool v2.2.3
Download HP USB Disk Storage Format Tool 2.2.3 Free - Windows-based Format Utility for HP Drive Key or DiskOnKey USB Device - Softpedia
and try to format it to NTFS.
(Right click on the .exe file and
Run as administrator. Make sure that the correct drive is selected for formatting. Better remove all other USB drives.)
Report results alongwith answers to the above two questions.