Although the Raspberry Pi 5 has a PCIe interface, it doesn’t have a slot for a PCIe SSD. There’s now a whole range of plug-in boards (HATs = Hardware Attached on Top) for retrofitting SSDs. They differ in whether they’re mounted above or below the main board of the Raspberry Pi, whether they’re compatible with the fan and how many SSDs they can accommodate. Smaller plug-on boards such as the recently introduced M.2 HAT+ from the Raspberry Pi Foundation are unable to cope with the long 2280 SSDs. There are even HATs that can accommodate two or four SSDs. However, these variants, which are prima…