(Note : This is to achieve mounting from command prompt, DE users please excuse.)
I was reading the arch wiki on mounting a USB storage device and quiet confused with the way the article is structured. May be the article is too generic in context to cover most possible cases so for a beginner it would be too much to understand, AIT :P. I am writing a concise approach here to get it done.
From command prompt, type
root@localhost ~ # blkid
/dev/sda1: LABEL="System Reserved" UUID="36423FA6423F6A2F" TYPE="ntfs" /dev/sda2: UUID="B6DA024DDA0209F7" TYPE="ntfs" /dev/sda3: UUID="08D44A70D44A5FD4" TYPE="ntfs" /dev/sda4: UUID="f2025d4a-ab25-41de-a530-285f5b979cd0" TYPE="ext4" /dev/sdb: UUID="6ABB-232A" TYPE="vfat"
Now the last entry is my pen drive.
So i do the following
root@localhost ~ # mount /dev/sdb /mnt/usbdrive
and it works like charm. :)
(Note : create a directory inside mnt by name "usbdrive", in case if mount complaints.)