Use it for a firewall / router, but don't bother with WiFi. There are no antenna connectors, so it probably doesn't have a card installed and normal WiFi cards make terrible access points anyways.
If you want to use OPNsense, make sure the NICs are supported. If it has Realtek NICs, you will probably have to use a Linux based firewall.
You know not to trust that site with any more information. Once the alias is deleted, anything sent to it will result in a delivery failure and you won't get any more spam from anyone they sold that address to.
If your mail server supports aliases, you can make one for each site you sign up for. Then if you start getting a bunch of spam, you can delete the alias and you will know which site sold your information.
A used SAS card can be found on ebay for $20-$30. You just need a PC with an open 8 lane PCIe slot and a few drive bays. An older 6gbps card is fine for a few mechanical hard drives.
Is your GPU reducing the VRAM frequency when it's idle?
If the vertical timing is different between the monitors, the VRAM will have to run at maximum speed all the time and that can add 20 watts or more to your idle power consumption.
Sometimes that works, it depends on how the server is set up. For DNS blocking, you just switch to a different DNS server or run your own DNS resolver.
I just store all of the CAD files in a directory. I don't keep any of the STL files or gcode. I probably should organize the files better, it's getting to be a mess.
If you need to charge LiFePO4 batteries below freezing, you can add a heater to the pack. There are even some batteries available now with built in heaters that come on automatically below freezing.
I thought they would have been pushing for sodium ion batteries instead. Lead acid batteries are a bad choice for anything that needs to be cycled frequently.
If you put every option in a GUI, there would be so much stuff that nobody could find anything.