Hello - I've searched for threads on the matter, but I think they're not as fresh, since alternative #1 below has been out for a while now. I've been considering getting an external storage solution, and have read of three alternatives for my Mid-2014 MBPr: 1. Transcend JetDrive - I've read these may pose some mount/dismount problems when exiting Sleep mode. It's an otherwise adequate one-piece solution, being flush to the side. I don't believe I've read any issues with read-write speeds thus far. 2. SanDisk USB 3.0 UltraFit Drive. Although it seems to be on the fast side of read-write, I've read many users complain of heat issues leading to slow performance or even failure, so I'll likely ditch this; the good part is (was) that the MBPr has two USB slots. 3. Get a Micro SD card and a mount such as a Nifty or a BaseQI. Mileage may vary according to the card. Can someone provide input on their experience, particularly on #1 and #3? Thanks, regards.