Just a quick tip for those of you that want a little more storage on their MacBook (should work on all the Macbook range from Air through to Pro).For around £20 I added an extra 64gb of space, for £60 you can go as big as 128gb.
Purchase a micro SD card, this one is 64GB and class 10 speed
LINK TO AMAZON
You will also need a Micro SD short adapter, these are shorter than an average adaptor so they don't stick out more than about 1mm when fitted into the SD slot on your computer. If they were longer they would get caught when transporting the computer and could break.
And thats it, use the adaptor to fit the SD card and you will have instant extra space.
I use mine as a mini back up drive for software, some music and an emergency expansion if my main drive starts to run low on space when I haven't had a chance to archive old work.
Enjoy your extra cheap storage.