Flash drive failure? Help

I have been using a macbook air (mid 2012) for a while, it gave me some warnings for the last 3 days that my start up memory is low but I did not know what to do although I had 8GB free.
Yesterday i finished my work normally and closed the lid. Today when I get to open it, it does give me a blinking folder with a question mark, I have read all types of software troubleshooting of this problem, The only one I proceeded in was : (after turning the computer on, hold down the Options key for a while to choose your start up drive) instead of showing hard drives to choose from, I get to choose wifi connection and the only option to use "Internet recovery" I choose it and it took a while to load then gave me a bunch of options and in the disk utility I can see my start up drive and I click verify and it tells it is OK,then when I go to choose The start up disk, it searches for available disks and the list is kept empty, so I neither have the option to continue installation of a new copy of OSX nor choosing it for startup... So what is wrong ? I really hope for an answer that will save all my data that is on the disk( i have a lot of important data for university) and a fast one because my university semester just started and i need the computer urgently
I really appreciate anyone's reply...

It seems that there has been a rash of the Toshiba 128GB SSD's failing lately. I would make an appointment at your local Apple shop (or maybe just turn up with it) and see what they say.
Lots of these have been replaced lately. In fact it seems they may have run out of the replacement SSD's.

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