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Kingston Technology DataTraveler G4 USB 3.1 Gen 1/USB 3.0 Flash Drive - 16 GB - £5.28 - Amazon Prime Exclusive
16Gb Kingston with a keyring hook and save 39%! Its a USB 3.0 and is backwards comaptible. Best value for this USB I have been able to find.
FCUK YOU KINGSTON!
Try the manufacturer and if they don't menton speeds it means it's slow.
I bought 2 of them some time ago, and the write speed was terrible...
3 years of use isn't bad for such an item. I've had a hard drive fail after 6 months, Quality writeable DVDs unreadable after a year or so. I suggest you're being a little unreasonable.
Yeah, I consider USB sticks, especially cheap unbranded types, to be the most unreliable of storage types that are really only suitable for moving data about as opposed to storage and definitely not for backup of anything important and non-replaceable.