Use a bunch of USB Flash drives in a RAID array. - YouTube
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
USB C Dual M.2 B-Key SSD RAID Enclosure Adapter, USB 3.1 Gen 2 Type C to Two M.2 SATA B Key Solid State Drive External RAID Enclosure Support RAID 0, RAID 1,
CRU ToughTech Duo 3SR USB 3.0 SATA 2.5" RAID 0 1 Enclosure (36020-3010-0100)