
It's amazing how cheap memory has gotten. They have excellent read/write speeds and as far as I can tell they are built to standard and have good durability. The price is cheap enough to consider them expendable or to lend them (even to less reliable friends). Color coded but you can attach a small sticky label for identification if you wish.

Titan Gray Samsung BAR Plus 256GB USB 3.1 Flash Drive (MUF-256BE4/AM) with Up to 400MB/s Transfer Speed
69 Review

Kingston DataTraveler SE9 32GB USB 2.0 Flash Drive for Reliable Data Storage (DTSE9H/32GBZ)
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32GB SanDisk USB Flash Drive (SDCZ430-032G-A46)
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Samsung BAR Plus 128GB - High-Speed USB 3.1 Flash Drive Titan Gray (MUF-128BE4/AM)
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18 TB External HDD Western Digital WD Elements Desktop, USB 3.0, black
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Shock-Resistant Transcend StoreJet 25M3 USB 3.1 Slim Portable Hard Drive with 500GB Capacity
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8TB Seagate Backup Plus Hub Desktop Hard Drive with Data Recovery Services
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2 TB External HDD ADATA DashDrive Durable HD650, USB 3.2 Gen 1, Blue
55 Review