I have a 128GB bootable pendrive with Windows Live on it.
I wanted to create an ISO image of this pen-drive so that I can create a bootable pendrive later.
This question might seem to be [Duplicate] of Convert bootable USB to ISO file,
but from the solutions given (dd and gnome-disks), it creates a 128GB ISO file,
even though the used space is only 4GB.
Is there any way to create an ISO of only used space (4GB)
and later make a bootable pen-drive from it?
I am using Ubuntu 15.10.
