This is a quick review of the Transcend Jet Drive Lite 330, which is the 128GB model made for the 13 inch MacBook Pro Retina (it also comes in a 64GB model). The Jet Drive is also made for the MacBook Air and 15 inch MacBook Pro with Retina display, not the new ones with thunderbolt 3 for obvious reasons.
Why do you want this? Well, if you have lots of documents that don't require the speed of a SSD (Solid State Drive), it's best to utilize the card reader full time. I for one would rather spend the $100 to expand my storage than spend several hundreds for an upgraded SSD. So far, I'm using it to store my already processed videos, pictures, and downloaded files. This frees up space for when I'm in Final Cut Pro processing videos and rendering them afterwards.
One thing you need to do before using is to open the Mac's Disk Utility to format it into a Mac file hierarchy which is real simple. Other negative is that it's sort of difficult to remove the disk once it's in your reader slot. It's designed to sit pretty flush with the MacBook so it doesn't snap off or get caught on anything. I found the read and write speeds pretty quick but other reviewers have mentioned of inconsistencies with the read and write speed. For me, I'm not too concerned with that, as long as it works, I'm good!
There are a lot of different options out there to expand the storage on your MacBook, I just went with the trusted brand. Let me know if you have any questions! Thanks for reading!
Purchase here from Amazon.ca - http://amzn.to/2l2LPch