As far as i know blockchain keeps increasing in size so how would this keep up? for example if i order today there may be 2+ GB of data tomorrow!
Good question! According to the graph on this page:
https://blockchain.info/charts/blocks-size, the blockchain grows about 33 MB per day (~1 GB per month / 30 days). Blockchain-MicroSD is intended to replace the initial downloading of the 20+ GB. 33 MB / day
should be doable for those on limited internet connections. As time goes on there will be more current versions of the blockchain available on Blockchain-MicroSDs as well.