SSD-HDD trays or SSD sleds are specialized mounting brackets designed to securely hold solid-state drives (SSDs) or hard disk drives (HDDs) inside a computer case or server chassis. They facilitate easy installation and organization, often converting a smaller 2.5-inch SSD to fit into a standard 3.5-inch drive bay. These trays ensure proper alignment, airflow, and protection for drives, enhancing performance and system aesthetics. They are an essential accessory for system builders, server managers, and enthusiasts upgrading or customizing their storage solutions.