During disposal of storage media, due to regulatory requirements some of the data is required to be saved for a certain period of time. This is an example of what?
There are times when certain data is required to be kept for a certain period of time due to legal, regulatory or policy reasons. There are also requirements pertaining to when data isn’t supposed to be kept. This is all referred to as data retention.
Wikipedia
Data retention defines the policies of persistent data and records management for meeting legal and business data archival requirements. Although sometimes interchangeable, it is not to be confused with the Data Protection Act 1998.
The different data retention policies weigh legal and privacy concerns economics and need-to-know concerns to determine the retention time, archival rules, data formats, and the permissible means of storage, access, and encryption.