A privacy solutions engineer reviews a company's data storage strategy. Active customer records are kept in a high-performance database, while records inactive for over two years are automatically moved to a low-cost cold storage tier. During the review, the engineer finds that cold storage retains records indefinitely because the archival process was designed only to reduce storage cost, with no linkage to the customers' original retention requirements. What is the engineer's BEST recommendation to align this persistence practice with privacy principles?