HPE ProLiant Microserver Gen10+

Small form factor servers from HPE sporting four drive bays. Do not consider buying these, they are horrendously finicky and HPE's software and service are dreadful.

SSD storage advisory

Don't expect to get much storage density out of these -- a design flaw means that the SATA power budget is far too low to power more than two decent-sized SSDs. If you're seeing random detection of drives during boot, even during cold restarts, this is why.