Hey,

Assuming you bought the "complete collection" you should have it available already. To clear things up, I'll just go through expansion and what they added.

Heavensward (which you cannot buy anymore, its standard as part of the "complete collection" or gets added to your account upon purchase of Stormblood)

- Dark Knight, Astrologian and Machinist
- Au Ra races

Stormblood (our current expansion until July)

- Samurai and Red Mage
- No new race

It also depends on where you bought it. I have the game on Steam, only Steam purchases work on my account. If you bought a retail version of the game it will all be MogStation based - speaking of which it should tell you which expansions you have on that page too.

Either way, if you didn't get the complete collection and have the starter edition, all you should need to do is purchase Stormblood and Heavensward will be included - giving you everything we have available in the game currently.

Hope this helps!