It is possible to do so, but unfortunately the software controlling Z-Pi 7 must support the capability to backup the NVM (non-volatile memory). Currently the only known method is to use PC Controller 5 through Simplicity Studios, but at this time, that software is only available through Windows.
1. You can get PC Controller 5 through Simplicity Studio here: PC Controller 5 through Simplicity Studios 5
2. You can learn how to connect your Z-Pi 7 to your Windows PC here: Z-Pi 7 Serial to PC USB