Hi all, I have a mid-2011 MacBook Air 11" and while it is an old machine, it is nearly perfect for my needs. However, the 128GB internal SSD is very restricting. I would like to remove the SSD and replace it with a 256GB SSD. I am planning on doing the replacement myself by following the guide off iFixIt. So the question I want to ask is if any of you have any advice on which model I should buy. I am based in the UK so British shops/links would be more appropriate. Thanks and if you have anymore questions please ask. Andy PS. I tried posting this on the MacBook Air board but there was no response and tis board seems just as appropriate for the question and busier.