About 10 years ago I bought a NAS, a Western Digital Sential DX4000, it had 4 3 TB drives and I hung it off the home network. The family used it as a backup location for pretty much anything. It finally failed last year, I haven't tried to recover anything from it yet but the kids are gone off to college and I think I've got all the data that was on it on other drives so I don't think it's worth trying to recover anything from it, which is fortunate cause it looks like it would be a pain since one of the drives is dead and the enclosure is dead.
In the spring I bought 2 Seagate EXOS recerted 20TB drives and dropped them in my main desktop, its a Dell XPS 8930, it's a little older but it had 64 GB of memory and runs an i9.
My plan was to RAID 1 them, since that would be the simplest, robust, and easy to recover if one dies. I know I can do that with software but was looking for a recommendation for PCIe card that wasn't too too expensive? ....or is there another solution that I'm missing?