system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: The differences of a Solid State Drive and a Hard Drive and why SSDs can have much smaller data sizes and yet be much more efficient.

Exactly what it says on the tin.
gpt
SSDs are like warehouses where each bit is stacked on a shelf in neat rows.


HDDs are like DVDs or records.  All of the bits are stored on a line in a big spiral. The spiral moves really fast so a "needle" can read the data from the spiral.


SSDs don't have any moving parts and use less power. No spinning spiral means an SSD can read all of the data at almost the same speed, and also extremely quickly.  SSDs are expensive right now, and harder to make than HDDs, so the ones you can buy are a lot smaller than their HDD counterparts.