In HiloV2 module, there is a special flash driver which works with a file system. This file system has been design especially for the flash management. The strategy is to increase the life of the flash memory by never writing the same data at the same place. This mechanism saves a lot of writing and erasing cycles.
The flash of the Hilo is able to have more than 100.000 writing / erasing cycles.
There is no limitation for the reading cycles.