You can use any standard tool like gparted. So you need to first create a partition on it that will hold AL. I assume you want to install AL on the 1TB SSD. Many times we forget there is important data there and lose it. My advise is to think thrice before any resizing or repartitioning. I am going to sleep now, but can help you again around 5AM Pacific time. Only then, use gparted (perhaps just boot into the system w/ a bootable linux USB and then open gparted and resize the partition). So please be SUPER careful when doing that. The main concern is that resizing partitions CAN DESTROY DATA. I don’t know what data you have on your hard drive.

If you need help w/ gparted, i can help you. You can make do with much lesser, but depending on what data you would like to have on there a few tens of Gigs would be safe. give it a few tens of G for a very safe size for AL. You should be able to resize it using some standard tool (gparted etc.). Somehow, you have made the partition /dev/sda1 too small.

Allow resizing arch virtualbox