I have to acknowledge that this was not my work, I got it from some other forum.Wel the steps are:
1.create directory:mkdir /mnt/usb
2.edit fstab file :vi /etc/fstab
append: /dev/sda1 auto noauto,user,rw,exe 0 0
save and exit
3. Reboot
4.#mount /mnt/usb

When I posted for f1 I got stuck coz I had not done step 1. If u don't create directory, it will give an error message "you need to specify file type"

Enjoy!