https://www.qnx.com/developers/docs/6.6.0.update/com.qnx.doc.neutrino.building/topic/building_nto_FLASH.html
Building a flash filesystem image
If your application requires a writable filesystem and you have flash memory devices in your embedded system, then you can use a QNX Neutrino flash filesystem...
building aflash filesystemimage
https://www.mikecramer.com/qnx/qnx_6.1_docs/embedding_sdk_en/building/flashfsys.html
Customizing the Flash Filesystem
Customizing the Flash Filesystem
the flashcustomizingfilesystem