Types of Sandbox

1. Developer Sandbox : Developer sandbox are intended for coding and testing. Developer sandbox copies all application and configuration set up information to sandbox.

2. Pro - Developer Sandbox : Pro Developer are intended for coding and testing. Copies all your production org reports and dashboards, price book, products, apps and customization but excludes all organisation standard and custom records, documents and attachments. Pro developer have large storage limit which allow more robust development and more test data sets

3. Partial Data Sandbox : Partial copy sandbox are intended to be used as testing environment and can be used for quality assurance tasks such as user acceptance testing and training. It includes reports and dashboards, pricebook, products, app, customization and custom and standard records, documents and attachments.

4. Full Sandbox : Exact copy of Production including all data, supports full performance testing, load testing.

Comparison :

Sandbox Name          Copies Metadata        Copies Data        Refresh Limit        Data Limit

Developer                    Yes                     No                Daily              200MB

Pro Developer             Yes                     No                Daily               1 GB

Partial                          Yes                     Yes               5 Days             5 GB

Full                               Yes                     Yes               29 Days      Same as Prod