OWC or Macsales, however you want to go about it is a solid company that has been serving the Mac community for years. I remember doing my first upgrade on an old MacBook Pro. I went from the standard turtle speed HDD to one of their super-fast SSD kits! I also lumped a memory upgrade in there. Suddenly my 4-year-old MacBook at the time was running circles around my video edit system. These guys are no joke, check their specials out here ... https://eshop.macsales.com/shop/specials