@TheOneDoc@tech.lgbt@aetios no aditional storage as of yet.
If I had to I would add a 2242 m.2 sata as system drive and replace the NVME SSD with something bigger.
I however will test it with a 8TB XPG S70 BLADE that I have for a couple more days before it's going out and if I would need spinning rust I know that the ICY Box JBOD USB 3 enclosers works great. had one running on a pi 4 for 5 years in 4 x 8TB HDD config with snapraid without a hitch and the 5 bay ORICO one works as well both use the JMS567 SATA to USB bridge chip.