It would have been better if you could have posted the result of mtab file.
Anyways, lets try to do it manually.
first create a mount point.......in terminal type: sudo mkdir
../../media/usbDrive/
The above command would create a directory
Then manually mount your usb using mount command
then, type df -h -------Now, before typing this command, PLUG IN your
flash drive
it would list all the drives attached to your pc. From the list, find you usb
drive name in the first column....My usb was shown as follows:
/dev/sdb1 1.9G 1.9G 22M 99% /media/ILLUSION
Then open your mtab file:
gksudo gedit ../../etc/mtab
In your mtab file, at the end, type the following
/dev/sdb1 /media/ILLUSION vfat
rw,nosuid,nodev,uhelper=udisks,uid=1000,gid=1000,shortname=mixed,dmask=0077,utf8\
=1,flush 0 0
*bold font indicates:/dev/sdb1 may vary on your pc, find through df -h command
as previosly mentioned
ILLUSION - is the name of my usb drive - name of your usb can be found, from df
-h command.