RNFB and RN-fs are the main two 3rd party modules that provide filesystem access. I chose one of the two after checking the code, the API, and the user base and

RNFB and RN-fs are the main two 3rd party modules that provide filesystem access. I chose one of the two after checking the code, the API, and the user base and commits (at that time the RNFB maintainer still was very active and had plans) to see which one looked more promising for my use case. I'm pretty familiar with both those modules down to the code (out of necessity, had to provide a lot of patches, I'm still using my own fork because when the maintainer disappeared there was no chance to get anything merged).