I threw in a moderately fast USB drive (~90 mb/s after pi4 overhead) because I got sick of SD cards dying every 6-12 months. Pi4 is very speed limited. Even if

I threw in a moderately fast USB drive (~90 mb/s after pi4 overhead) because I got sick of SD cards dying every 6-12 months. Pi4 is very speed limited. Even if you tried to use an ssd, I think the highest I've seen is around 250mb/s with an nvme drive that gets a few gb/s in a real computer. In theory it should get to like 500mb/s for sata limits.