[Bitesized] How are large(r) rows stored?

[Clippy]

[Bitesized] How are large(r) rows stored?

[Clippy]

BTW, just curious - would you folks prefer additional text alongside these images? As in - a bit more in-depth? Or are these graphics just enough?

P.S. First graphic was already posted in previous post, but I think it makes sense having it included here as well as it makes for a full point