I've tried 3 out of 5 - takes about 20-25 minutes to copy a continuous 4GB file into them. A real USB2 drive should take much less time (no more than 15 minutes). In contrast, I copied the same file (it's an ISO for ESXi 7) to my 128GB USB 3.0 drives - the file was copied in less than 3 minutes. I've also tried copying smaller directories of files to these drives - only to get frustrated over time. This might work for college students and others who have time to wait. I return mine.
Compact and Convenient: SanDisk Cruzer Fit USB 32GB Flash Drive (SDCZ33-032G-A11)
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Samsung BAR Plus 128GB - High-Speed USB 3.1 Flash Drive Titan Gray (MUF-128BE4/AM)
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Sandisk Ultra Flair 128 GB Silver USB Flash Drive: Reliable and High-Speed Storage
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Kingston DataTraveler SE9 32GB USB 2.0 Flash Drive for Reliable Data Storage (DTSE9H/32GBZ)
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π Seagate Expansion 3TB Portable USB 3.0 External Hard Drive (STEA3000400) in Black
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8TB Seagate Backup Plus Hub Desktop Hard Drive with Data Recovery Services
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18 TB External HDD Western Digital WD Elements Desktop, USB 3.0, black
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2 TB External HDD ADATA DashDrive Durable HD650, USB 3.2 Gen 1, Blue
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