Use a bunch of USB Flash drives in a RAID array. - YouTube
QNAP TR-004 4-Bay USB 3.2 Gen 1 RAID Expansion Enclosure
eSATA 6Gb/s and USB3.0 5Gb/s host to 2x SATAIII port support PM (JBoD) and raid 0/1/BIG controller - [eS6U3-DS3r]
4TB Mercury Elite Pro Dual USB 3.1 Gen 1 and Thunderbolt 2 RAID
HPE P21868-B21 32GB microSD RAID 1 USB Boot Drive Server Accessories - Newegg.com
P21868-B21 HPE 32GB MicroSD RAID 1 USB Boot Drive
QNAP TR-002-24W-US 4TB 2-Bay USB 3.2 Gen 2 Type-C TR-002-24W-US
Amazon.com: 2 Bay RAID Hard Drive Enclosure, cenmate External USB 3.0/USB C to SATA RAID HDD Docking Station Support RAID 0, RAID 1, Normal, JBOD for 2.5"/3.5" HDD SSD RAID Storage 2x16TB :
Amazon.com: 2 Bay RAID Hard Drive Enclosure, cenmate External USB 3.0/USB C to SATA RAID HDD Docking Station Support RAID 0, RAID 1, Normal, JBOD for 2.5"/3.5" HDD SSD RAID Storage 2x16TB :
TerraMaster D5-300C USB 3.0 (5Gbps) Type C 5-Bay RAID Enclosure Support RAID 0/1/Single Exclusive 2+3 RAID Mode Hard Drive RAID Storage. PC PitStop Data Storage Solutions - SAS Enclosures, DAS, NAS, iSCSI
TERRAMASTER D2-310 USB Type C External Hard Drive RAID Enclosure USB3.1 (Gen1) 2-Bay RAID Storage Support RAID 0/1/Single (Diskless)
CineRAID CR-H252 2-Bay USB 3.0 Hardware RAID Enclosure – Supports up to 4TB drives / RAID 0, 1@ SCSI4ME.COM
Amazon.com: BUSlink CipherShield 2-Bay RAID 1 Mirror USB 3.0/eSATA FIPS 140-2 HIPAA 256-bit AES Hardware Encrypted External Desktop SSD Drive (8TB - 4TB x 2) : Electronics
Amazon.com: TERRAMASTER D5-300 USB3.1 (Gen1) Type C 5-Bay External Hard Drive Enclosure Support RAID 0, RAID 1, RAID 5, RAID 10, Clone, JBOD, Single Disk Hard Disk RAID Storage (Diskless) : Electronics
Rocpro U35 USB Type-C® Desktop RAID Storage
QNAP TR-002 2-Bay USB 3.1 GEN 2 RAID Expansion Enclosure
OWC 2.0TB Mercury Elite Pro Dual SSD RAID Storage... at MacSales.com
P21868-B21 P21870-001 NEW SEALED HPE 32GB microSD RAID 1 USB Boot Drive | eBay