HDD Caddy for Server Uniformity and Protection This 3.5 Inch (LFF) hard drive caddy allows you to give your storage drives a uniform look and feel within your server estate. This HDD tray also offers protection against damage and general wear to keep your components lasting and working well. 3.5 Inch SAS HDD Tray This HDD caddy is a 3.5 inch (LFF) build to support your large form factor drives. It features a SAS connectivity and is fully compatible with SAS HDDs.