@mawg Since the Omega2 runs Linux, it has a file system, meaning you don't have to directly access flash to store data. Instead you can read from and write to files.
There are plenty of online resources for file I/O:
Here's an example for C: https://www.tutorialspoint.com/cprogramming/c_file_io.htm
And another for Python: https://www.tutorialspoint.com/python/python_files_io.htm