[mattthebaker]

What do you do with 8MB when the OS is 512MB+? Adding NOR Flash is normally pretty simple -- No bad blocks and a standard SPI interfaces most embedded devices have controllers for. The high end controllers can typically map NOR flash directly into the system address space.

[nickpsecurity]

I was thinking it might be good for RTOS alternatives, a tiny Linux, or (relevant here) something to deal with SDcard problem. Tell users about it with suggested action.

And you said 8MB. I just named off a range at different price points to help answer parent's question. I dont know embedded enough to assess what's needed here. Thanks for tip about NOR flash.