A data storage layer is where your gathered data is stored and saved for when it is needed. There are four layers in data warehouse architecture: data source layer, data staging layer, data storage layer and data presentation layer. The data storage layer makes it easier to back up files to ensure they remain safe and can be recovered quickly if computer hackers strike or there is some sort of outage.

In the data storage layer, the data is cleaned, transformed and prepared with a specific structure. This enables access by those within a business who require the data for various reasons.