What storage limitations does the HP EliteDesk 800 G1 Mini have?

Regarding the HP EliteDesk: The EliteDesk 800 G1 Mini only supports a single 2.5-inch SATA drive with no M.2 slot, so you’re stuck with SATA SSD speeds and can’t use an NVMe drive. It’s a Haswell-era relic, but good to know if you’re buying one second-hand for a lightweight office build.