Here's my APU NAS project.
My goal was to have cheap, small and low power LXC/KVM/Docker setup mainly to be used as firewall, VPN gateway and NAS.
-APU4D4 (FW v188.8.131.52)
-MINI PCIE to NVMe M.2 (https://www.aliexpress.com/item/1005001795282927.html)
-Mini SATA to SATA (https://www.aliexpress.com/item/1005002165516219.html)
-Power 2 pin female > 2 x SATA 15 pin (https://www.delock.com/produkt/85249/merkmale.html?f=s)
-SATA cable 90dg angle
-SATA cable straight
-M3 standoffs and screws
-M2 standoffs and screws
-small aluminium flat bar (I used some random stuff I had laying around)
-OS Disk: SK Hynix HFM256GD3HX015N PCIe NVMe
-Data storage: 2pcs Samsung SM841N SATA SSD mirrored
Managed to get everything fit inside case1d4 without any major issues. Just needed to take the SSDs out from their case and build some mounting points. Shorter SATA cables would of been better, but those were what I had in hand.
It's running Proxmox 7 on Debian 11 and booting from NVMe.