HP K4T74AA 2-In-1 Carrier - Storage Drive Carrier (Caddy) - 2.5 Inch

The HP K4T74AA is a 2.5-inch drive carrier that converts a standard 5.25-inch odd bay in an HP workstation into space for two HDDs or SSDs, for users looking to add storage to a compatible system.

Recommended For

• Owners of a compatible HP workstation with an available 5.25-inch optical-drive bay who want to mount two 2.5-inch HDDs or SSDs in that bay.
• Workstation users adding internal storage for project files, media libraries, or other data who can use two 2.5-inch drives, each up to 15 mm tall.
• HP Z-series workstation owners who have confirmed their specific model and bay support the K4T74AA and want an internal, rather than external, drive-mounting solution.
• Desktop builders repurposing an unused optical-drive bay for additional internal HDD or SSD capacity, with the required drives and cabling available separately.

Real-World Use Scenarios

• When an HP workstation has an unused 5.25-inch optical-drive bay, install the bracket there to add space for two 2.5-inch HDDs or SSDs; the bay becomes an internal storage location instead of sitting unused.
• When a compatible Z640 needs additional 2.5-inch drive capacity, use the bracket to mount third or fourth HDDs or SSDs in the optical bay, subject to the workstation’s drive and cable support.
• When upgrading a workstation for both fast access and extra capacity, mount an SSD and a 2.5-inch HDD in the same bracket; the drives can serve separate storage roles, provided the computer supports and connects both.
• When a workstation is used for projects that generate large files, add compatible 2.5-inch drives in the optical bay to expand internal storage without placing a separate external drive enclosure on the desk.
• When fitting the bracket during a workstation storage upgrade, check the exact model’s compatibility and plan for data cables: HP notes that SATA/SAS data cables are not included, so the drives may need separate cabling before they can be used.

Spec Summary