SSD on Macbook Air Mid-2012 13” A1466

Hi Everyone,

History:

My Macbook Air 2012 start showing blinking folder with question mark. I was able to use it by using force shutdown and restarting it. This is the scenario for everyday. However, after a week or two, I was no longer able to use my laptop. After my thorough research, I learned that the my concern now is hard drive issue. It was also verified by the technician I went to. This technician said that my SSD is a little wet which might be caused of the melted thermal paste by other technician who cleaned my Macbook. This other technician might have put a little more thermal paste causing the SSD to become unusable.

Would like to consult the following:

1. If I buy a 500 GB of OWC at https://eshop.macsales.com/item/OWC/S3DAP2A6G500/ will this fix my issue?

2.Is macsales.com a legit distributor of OWC?

3.Will 500GB SSD work on my Macbook Mid 2012 A1466? I have read that it can, https://support.apple.com/kb/sp670?locale=en_PH. Can you verify?

4.If I increase the SSD of my Macbook will it also help the overheating problem?

5.Would it be safe if I just buy 250 GB or is it better to buy 500 GB?

Your response is highly appreciated.