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Hey I have a Macbook Pro 15 " mid 2014 A1398 I have a really hard time finding a new 3. part hard drive for the MBP. Which hard drive should I look for that fits? Can I use this one Samsung model mz-jpu256t/0a2? And what is the differents between a mz-jpu256t/0a2 and mz-jpu256t/0a6? Thanks

I have really good experiences with the OWC drives for the MacBooks. No hassles, available with drive kit or just as a separate drive, and no worries about compatibility. https://eshop.macsales.com/shop/ssd/owc/… Please take care when replacing to do it ESD safe, static electricity can ruin everything and leave you with a very hard to repair MacBook. For instructions nothing beats the guide here on ifixit: MacBook Pro 15" Retina Display Mid 2014 SSD Replacement