Saving data to flash

I have a adalogger MO and I would like to save the data to the flash part of the unit. My understanding is that I can't use EEProg.h because it won't work with a MO devices. Yes, I can save the data to the sd card but I would like to learn how to save to the flash. My goal is to save the unit's information like device number etc to the flash so I can call it up when it reboots. I would like to keep the sd card data to just the data collected by the adalogger.

Can anyone give me any examples on how to write and read some simple data to the flash?
thank you!

A search for arduino zero eeprom simulation

The Zero is also based on a M0. Anything of interest?