When you have an information lifecycle governance initiative, it’s important that you prioritize when and how you deal with sensitive data. Ultimately, the priority is a business decision. Do you manage proprietary information first, and then identify junk, low value, and abandoned data—or the other way around?
Content cleanup means purging it of unnecessary items and appropriately archiving the ones that are necessary to your business. Doing so allows you to reduce your overall unstructured data footprint -- i.e. leaving you with less junk and stale data to distract you, as well as less sensitive data to protect, thereby reducing the overall risk posed by your unstructured data.