This is why engraved stone tablets remain the standard storage medium for religious texts. Easy to read anywhere, especially if you use a burning bush for lighting.
They should come with a cave for storage, else wind will erode the inscriptions. Running water will destroy them too. Even the cave may collapse on it.
Yep, plenty of gravestones are weathered to the point of illegibility after 100 years. Pick that mineral carefully. Or maybe go with a ceramic?
A continuous revelation is more sustainable
Oral tradition could be good too if only the authors would ever bother to add error correction. Unfortunately this revolutionary distributed tech is held back by lazy implementations.