Bought them to install Linux, multiple distros. I really only need 8GB. Not exactly $5 a piece though, it's a great value. Tests show they use the USB 3.0 specification. I need them read-only after "burning" the ISO once. Works great for me. I've actually done it really well (running Linux directly from a flash drive).
Kingston DataTraveler flash drive 100 G3 256 GB, 1 pc. black
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Kingston DataTraveler SE9 32GB USB 2.0 Flash Drive for Reliable Data Storage (DTSE9H/32GBZ)
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Samsung BAR Plus 128GB USB 3.1 Flash Drive - 400MB/s - Champagne Silver (MUF-128BE3/AM)
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32GB SanDisk USB Flash Drive (SDCZ430-032G-A46)
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π Seagate Expansion 3TB Portable USB 3.0 External Hard Drive (STEA3000400) in Black
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2 TB External HDD ADATA DashDrive Durable HD650, USB 3.2 Gen 1, Blue
55 Review
8TB Seagate Backup Plus Hub Desktop Hard Drive with Data Recovery Services
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2 TB External HDD Western Digital WD Elements Portable (WDBU), USB 3.0, black
84 Review