Chromebook: 100 Gb Google drive free upgrade

I have a Samsung Series 550 with 3g and I am qualified for the 100 gb free upgrade for Google Drive but I cannot find how to get it. I looked it up and many sources say I have to be on version 23 (which I'm not).

I'm wondering if anyone is on the same boat as me, waiting for the update to get the upgrade. And I'm wondering when, if ever, I'll get the update.