Update/Write to .osm file

[ArduinoHocam]

Hi,

I am using overpy succesfully to make queries etc. I wonder that is there a way to update(write) to .osm file or maybe query for this to local map(.bz2 or .osm).
I've tried this manually using xml parser after I've extracted the <my_country>.osm.bz2 which is around 9.1Gb. So, I could not manage to update via parser because of the size I guess. Is there a way from overpy side or query side or maybe another tool for this purpose?
Thanks.
BR.