Based on another topic I think it was a RAID1 that failed and perhaps failed again during resync causing actual data loss. I’m not entirely sure.
Still I agree with Alexey. By far the best thing to do in your situation is run 2 nodes on the 2 HDD’s you have. Don’t bother with RAID as the sizes of your HDD’s are relatively small and in your case actually pretty likely to fill up. You’ll make more money if you just run more than one node. Avoid using docker this time. For multiple nodes on windows GUI you can try @Vadim’s toolbox.
Though this is not an officially supported method for installing multiple nodes, I think it is probably better than using docker. Be sure to keep an eye on development progress in that topic though.