Unless your second display can connect directly with its USB-C port, you’ll need a USB-C-to-DisplayPort or HDMI adapter cable to connect to one of the downstream TB4 ports. If you have the right ...

If you don't have one, or your PC is a bit older, you can still find a great deal on a SATA SSD. These are slower than NVMe drives but they're still a huge improvement on a traditional hard drive.