B&H Photo-Video offers the Transcend 128GB JetDrive Lite 330 Flash Expansion Card
bundled with a Transcend RDF5 USB 3.0 SDHC/SDXC/microSDHC/SDXC Memory Card Reader
with free shipping
. That's the lowest total price we could find by $4. This model works with 13" MacBook Pros with Retina from late 2012 to early 2015. It gives 128GB of added storage space with read speeds up to 95Mb/s and write speeds up to 60Mb/s.