Best Buy: LaCie Rugged RAID 4TB External USB 3.0 / Thunderbolt Portable Hard Drive Gray/orange STFA4000400
Glyph Atom RAID SSD 4TB USB-C Portable Solid State Drive, Black | Sweetwater
Addonics Portable Dual Drive enclosure lets you RAID on the go | Engadget
ORICO Dual Bay M.2 SATA SSD Enclosure RAID USB3.1 Gen2 Type C 10Gbps B-Key/B+M Key Solid State Drive Case Adapter for SSD Size 2230/2242/2260/2280 Support UASP - Walmart.com
LaCie Rugged RAID Shuttle Review | PCMag
LaCie 4TB Rugged RAID Pro Mobile USB Type-C RAID Drive