LaCie 6TB 2big Quadra USB 3.0 210Mb/s 7200rpm Professional Dual-Disk RAID Silver | eBay
RAID - adding disks to a Pi
USB stick RAID
RAID Enclosures | Newegg
5 Bay 2.5" and 3.5" SATA HDD External USB 3.0 / eSATA RAID Hard Drive Enclosure
USB stick RAID
Cable Matters 10Gbps Aluminum Dual Bay 2.5 Inch External SSD Enclosure (USB C Enclosure) with USB-C and USB-A Cables Supporting RAID 1 and RAID 0 - Thunderbolt 4 / USB4 / Thunderbolt 3 Port Compatible
Use A bunch Of USB Flash Drives In A RAID Array - Bobby Owsinski's Music Production Blog