Data footprints—or information about how data are accessed, used, manipulated, and saved in a given system—are important to maintain as networks store increasingly large quantities of data. If not managed carefully, this metadata can become an additional storage burden. Many different data footprint reduction technologies are being implemented in order to improve efficiency: archive, compression, de-duplication, and thin provisioning. This paper details the different technologies for data footprint reduction (DFR), as well as different techniques for data management. It also addresses data footprint impact, changing data access, changing lifecycles, and the economic benefits of DFR.