Watching the Activity Monitor, it's clear a LOT of resources get eaten up trying to index the files on the flash when you do a large transfer, even after the files are all copied, and the drive won't eject until it's finished. (I don't understand why Apple wouldn't be selling a 3.0 adapter at this point.) I originally bought the Apple adapter, which is 2.0, and it took something like ten times longer to transfer that 100MB than with the 3.0 adapters I got later. Make sure you get a USB 3.0 compatible adapter or hub (blue inside). The speed and ejecting issues seem to be mainly the result of two things: There are a lot of other people online complaining about the same issues, so it's not just our particular computers.Īfter some research, though, I think I've solved the problem. Oddly, I also noticed that the flash drives seemed to work fine if they were already plugged in when I started or restarted the computer, but were slow when I plugged them in after the computer was booted up. Every flash drive I tried did the same thing. minutes) and I had trouble ejecting the drive, even when the computer was offline and nothing else was running. When I first did this on my Mac, however, the same transfer was ridiculously slow (i.e. Using USB 3.0 on Linux it transfers in a few seconds, and the drive ejects immediately, in all cases. I have a directory of just over 100 MB in around 200 files that I frequently backup and move between computers using USB-A flash drives. I usually run Linux, but recently got a 2018 MacBook Air and ran into this problem.
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