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description: "Dalton stores all A/B testing and tracking data in European data centers for privacy and GDPR compliance."
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# Data Storage

Dalton prioritizes data privacy and security by using European data centers for all A/B testing and tracking operations. 

### European Data Centers

All Dalton A/B testing data is processed and stored exclusively within the European Union.
The primary data zone is eu-central.

## What Data We Store

### Visitor Data
**Anonymous Identifiers**:
- Session IDs for experiment consistency
- Device fingerprints for return visitor recognition
- Experiment participation records
- Variation assignment data

### Experiment Data
**Performance Metrics**:
- Conversion rates and goal completions
- Experiment content
- Aggregate experiment insights