For a place to start, there is a library called: StorageHelperRK with a number of examples. I have utilized code in the form of examples: 04-persistent.cpp & 07-validate.cpp on the Argon. I have not used it with the Boron yet, but it should work.
Check this link out too (great stuff!). This is where I first learned about this library being available:
https://community.particle.io/t/new-library-storagehelperrk/62895