Downloading Bitcoin Core IBD with not Enough Disk Space

Background: I'm looking to set up a pruned node but am required to download the entire blockchain (600 GB as of writing).

Q: I'm wondering if "Limit block chain storage" to 2 GB option will split the 600 GB into smaller chunks so that I can proceed with this IBD even with my current 400 GB disk space. If not, can I use an external SSD that is > 600 GB?