How does memory work according to the multi-store model?

Atkinson-Shiffrin Multi-Store Model: Three stages: 1) Sensory Memory: brief store for all sensory input (iconic = visual ~0.5s, echoic = auditory ~3-4s). Information attended to moves to: 2) Short-Term Memory (STM): capacity 7±2 items, duration ~30s without rehearsal. Maintenance rehearsal keeps info in STM. Elaborative rehearsal transfers to: 3) Long-Term Memory (LTM): unlimited capacity, potentially permanent. Types of LTM: episodic (events), semantic (facts), procedural (skills). Criticisms: too simplistic, ignores working memory model (Baddeley).