Chris has this chart, from Gartner and Stifel, comparing the annual capital expenditure per TB of storage of NAND flash and hard disk. Each TB of flash contains at least 50 times as much capital as a TB of hard disk, which means it will be a lot more expensive to buy.
This compares with Seagate and Western Digital’s capex totalling ~$4.3 bn over the past three years.
- Samsung’s new Xi’an, China, 3D NAND fab involves a +$7bn total capex outlay
- Micron has outlined a $4bn spend to expand its Singapore Fab 10
PS - "as cheap as chips" is a British usage.