
You could get something like a 5-bay HDD enclosure that connects to the mini pc via usb, but while that’s very clean it also might be slow and/or expensive. Alternatively you could get an NVMe to 5-port sata adapter and cobble together some kind of Frankenstein pc, which is probably cheaper and maybe faster, but is certainly a hack-ier solution and who knows what the reliability is like with them. I’m sure it’ll be a fun project regardless of what you go with.
Links for reference: https://yottamaster.com/en-au/products/yottamaster-5-bay-hard-drive-enclosure-aluminum-alloy-2-5-3-5-usb3-0-to-sata3-0-external-hdd-ssd-storage-enclosure-support-5-x-18-tb-capacity-ideal-for-enterprise-class-storage-solutionfs5u3 https://www.amazon.com.au/ChenYang-Express-Adapter-Converter-Extension/dp/B09MSZCRBV?
Thank you for the quality assurance, you may have saved my install.