Very possible as something like Minecraft server is popular enough so if there’s known vulnerabilities they might be trying to exploit them. Be sure you are hosting that on a separate vlan that is split from rest of your network.

If you want to be more safe only allow your friends’ IPs through.

Woah that’s a beaut. Do these take regular sata drives though? I find enterprise SANs tend to be super proprietary which makes them unsuitable for home use other than just messing around.