A cache folder is a temporary storage location where software stages data, files, or partial results before it finishes processing them. Applications use caches to improve speed, reduce repeated downloads, or complete a cloud save in steps. The files inside a cache folder may be hidden, renamed, or automatically removed later, which can make them hard to notice during manual review.
In cyber security, cache folders matter because they can hold sensitive content outside the obvious final location. A document, image, or export may exist briefly on disk even when the user thinks it is only in a cloud service. Defenders check cache locations during incident response, data loss investigations, and endpoint cleanup because attackers can also abuse them to stage payloads, drop temporary copies, or hide activity. Knowing where an application writes cache files helps teams reduce exposure, hunt for leftovers, and enforce proper disk and data handling policies.