HP PCIe to M.2 NVMe SSD adapter M29589-001 provides a PCIe interface for an M.2 NVMe SSD. It is an adapter card for connecting this type of storage drive through a PCIe slot, useful when adding an NVMe drive to a system with a suitable slot.
The listing identifies this item as an adapter, not as an SSD itself. It is designed for the connection between PCIe and M.2 NVMe storage; the drive is a separate component. This description is for the specific HP part number M29589-001.