Today only, Amazon offers the SanDisk 2TB Extreme USB 3.1 Type-C Portable External SSD for $279.99 with free shipping. That's $20 under our mention from a month ago and the lowest price we've seen. (It's the best deal today by $50.) This water- and dust-resistant drive features up to 550MB/s read speeds and up to 500MB/s write speeds.