I have a Lenovo m720q Tiny PC running Proxmox. It currently has a 4TB NVMe m.2 Crucial SDD (PCIe Gen3 M.2 SSD, up to 3500MB/s; CT4000P3SSD8). This is my first home lab and so I just installed Proxmox on the drive with the default ext4 format and started playing around with VMs.

After more research and reading, I was thinking of putting in another 4TB SSD to have Raid 1 ZFS which I understand is better for Proxmox and has me covered should one of the drives fail. Is this accurate? If so, my computer only has space for a SATA SSD. There is no additional NVMe slot. Does it matter which SATA SSD I get or would any one suffice? I was looking at the Crucial MX500 4TB SATA 2.5 Inch Internal SSD (up to 560MB/s; CT4000MX500SSD1). Are there any issues as one is NVMe and one is SATA? Also, it looks like the SSD speeds are different.