This message was posted on behalf of Intel Corporation
Thank you for your interest in the Intel® Edison Breakout Board.
The two methods that enable you to change the size of the root partition require flashing/formatting the board. If you want to check them, please follow this links:
Increasing the Root Partition Size on Intel® Edison Boards
Booting Your Edison from an SD (Linux)
So, unfortunately, a method to perform a resize of the partitions without flashing/formatting the board is not available.
If you have any update or question, don’t hesitate to contact us.
Have a nice day.