Data Retention Guidelines
The requirements for archiving data vary based on the business you are in, the locations you are operating in, and the type of information or data that is being archived or retained. Some data may be usefull for legal, tax and other purposes and some data may have little or no usefullness once it has been used by the system
Reasons you may be retaining data.
Legal Reasons
Business
Historical Reporting
Tax
Audit Compliance
Varys by Country, State and in some cases on Local Levels
Moving from or to a new system
Allow archive system to run
(some data required to all st5 to open
More:
Database Files - Retention
Guidelines