Low End Tech - USB Flash Drive Raid Array using Raspberry PI 2 - YouTube
Use a bunch of USB Flash drives in a RAID array. - YouTube
Glyph Studio RAID Mini 10TB mobile external RAID hard drive 5400rpm USB 3.0 Firewire 800 and eSATA SRM10000B
linux - How to tell if an external USB hard drive is spun down? - Super User
TerraMaster D5-300 USB 3.0 (5Gbps) Type C 5-Bay Raid Enclosure Support RAID 5 Hard Drive RAID Storage. PC PitStop Data Storage Solutions - SAS Enclosures, DAS, NAS, iSCSI & FC SAN
The Well-Tempered Computer
USB stick RAID
Oyen Digital MiniPro Dura RAID USB-C Portable Rugged Hard Drive – AMT GOV INC
Oyen Digital Mobius 30TB 5-Bay USB 3.0 RAID Array 3R5-EB3-30TB
RAID - adding disks to a Pi
Have a Spare Flash Drive? Build a RAID Array, Install Live Linux Distribution & More
Dual-Bay USB 3.0 2.5 in. SATA III Hard Drive RAID Enclosure | Eaton
Oyen Digital Mobius 90TB 5-Bay USB 3.0 RAID Array 3R5-EB3-90TB
MobileRAID MR8UT6G - 8-Bay 3.5" inch SATA to USB 3.0 / eSATA Hardware RAID-5 / JBOD Enlcousre - Sans Digital - Your One-Stop Storage Solution
Tripp Lite USB 3.0 SuperSpeed 2 Bay SATA Hard Drive RAID Enclosure hard drive array U357-002 - Corporate Armor
Have a Spare Flash Drive? Build a RAID Array, Install Live Linux Distribution & More
Rocpro U35 USB Type-C® Desktop RAID Storage
Amazon.com: Portable 2 Bay SATA RAID Enclosure for 2.5-inch Hard Drives with USB 3.0 Support - Up to 12TB Capacity - 4 RAID Modes - K25682 : Electronics
LogiLink UA0285 USB 3.0 Raid Hard Drive Enclosure 2-Bay for (2x 2.5 Inch) S-ATA HDDs/SSDs Height 9.5 mm with Case Fuse Black : Amazon.co.uk: Computers & Accessories