Big Data is viewed as a very good thing by most enterprises. But like with many things there can be too much of a good thing, say a number of Information Governance (IG) experts. Their message is that enterprises need to do more than protect their data from theft or infection — they need to get rid of some of it. The motivation is legal as well as economic, they say, for both economic and legal reasons. The cost and risk of eDiscovery can poke a giant hole in any economic assessment of information management costs.”]
Source: https://www.csoonline.com/article/2132768/sometimes-the-best-defense-is-deletion.html