live usb - Move a persistent USB Ubuntu to a smaller USB drive

I plan to move my persistent USB Ubuntu which is currently on a 32GB USB drive (limited to only 4GB by default) to a new 4GB USB drive. I'm thinking of using Clonezilla to do this. Is this the best option for the task? They also mentioned that "the destination partition must be equal or larger than the source one."
Would the copying work in my case then?

Any help would be appreciated.

Thanks!!

Just copy the casper-rw file from one USB drive to the other.

casper-rw is the name of the file where the Live USD stores persistent information.

Since the size of thencasper-rw file itself is 4GB, and Ubuntu will require an additional GB or so, you'll need a larger USB drive, say 8GB.