We've all bought too small disks in our Macbook's because SSDs are so small, here's the solution, and it's simpler than you'd think, you're just putting a little adapter into your mac's SD card reader, which has a small Micro SD card in it , a normal SD card sticks out and therefore can not sit there always, but this does not stick out and therefore sits perfectly when you have your Macbook with you around.

You just need to even buy the size Micro SD card you need and the speed you need, also you can get the extra space on your macbook.

We have a product similar to this, mDrive, however, made specifically for the different macbook's, so it always sat just right in your Mac even if you have a Mac that doesn't fit this card.

We sell 512 GB micro SD card here, there are also other sizes.

The adapter supports micro SD, SDHC and SDXC up to 512GB.

It sits perfectly in MacBook Air 13'', MacBook Pro 13'', MacBook Pro 15'' and MacBook Pro Retina 15''. But not 13" retina Macbook pro.