If it's the latest model, not sure if it can be upgraded as the storage is Flash memory hard wired to the Logic board
The SSD in the MacBook Air seems to be proprietary to Apple in terms of it's form factor. 3rd party upgrades were briefly available when the first all SSD models were released, but Apple quickly stamped on them.
So, technically the SSDs can be upgraded, but in practice, due to Apple's measures, they can't.
arent they just 1.8" drives or similar? we had a small dell that used a similar looking unit to the video above.
I'm assuming that the OP is talking about the current generation. If I'm wrong then I'll shut up and slink off![]()

For the 2011 MBA, as mentioned above, they do come in 256GB SSD; but OWC seem to have a 460GB SSD upgrade for it.
If it's the latest model, not sure if it can be upgraded as the storage is Flash memory hard wired to the Logic board
The Max storage on the 11" is 128Gb, whilst the 13" is 256gb