Terramaster F6-424. Most of the non-Synology NASes let you install whatever OS you want (but, don't provide any support other than "here's how you install it").

Terramaster F6-424. Most of the non-Synology NASes let you install whatever OS you want (but, don't provide any support other than "here's how you install it"). Unraid, TrueNAS Scale, and Open Media Vault are popular OS choices.