Real write speed: usb 3 saws at a speed of 24 to 35 MB / s, usb 2 saws at a speed of 6 to 24 MB / s. For example, my old Transcend 2.0 writes stably at a speed of 10-12. First I bought a-data 350, she sawed even steeper on usb 2, fell to 0 and jumped up to 15. I measured the speed by recording from a 3 Giga SSD file.
Compact and Convenient: SanDisk Cruzer Fit USB 32GB Flash Drive (SDCZ33-032G-A11)
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Titan Gray Samsung BAR Plus 256GB USB 3.1 Flash Drive (MUF-256BE4/AM) with Up to 400MB/s Transfer Speed
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Sandisk Ultra Flair 128 GB Silver USB Flash Drive: Reliable and High-Speed Storage
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32GB SanDisk USB Flash Drive (SDCZ430-032G-A46)
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2 TB External HDD Western Digital WD Elements Portable (WDBU), 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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18 TB External HDD Western Digital WD Elements Desktop, USB 3.0, black
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8TB Seagate Backup Plus Hub Desktop Hard Drive with Data Recovery Services
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