Answer first

These are related Xbox One-family models with different physical and performance constraints.

Do not make a library decision from the family name alone. The optical drive, exact model, title support and entitlement route can all change the answer. Source ↗ Source ↗ Source ↗

01 / Family comparison

Meaningful differences

ModelMain distinctionOptical-drive stateDocumented storageReader consequence
Xbox OneOriginal family configurationBlu-ray disc drive500 GBPhysical-media use still depends on the exact game and edition
Xbox One SCompact redesign4K Ultra HD Blu-ray drive500 GB, 1 TB and 2 TBCapacity alone does not identify an internal revision
Xbox One XHigher-performance revision4K Ultra HD Blu-ray drive1 TBEnhancements and compatibility remain title-specific
Xbox One S All-Digital EditionDisc-free configurationNo optical drive1 TBIt cannot read a physical Xbox disc

What stays the same question

All three names appear in the Xbox One family, but that alone does not prove any specific disc, accessory, Kinect setup, backward-compatible title or online feature will work. Use exact model and task evidence.

Continue by task

For a sensor setup, see Kinect compatibility. For physical and digital access, see disc versus digital.

Method

Claims separate documented facts from interpretation and uncertainty. Read our method.

Updates

Material factual revisions are recorded publicly. View the correction log.