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    Slow USB Connection

    Discussion in 'Apple and Mac OS X' started by MKang25, Sep 25, 2011.

  1. MKang25

    MKang25 NBR Prisoner

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    The MBP I have in my signature is having problems with both its USB ports. I noticed a few days ago when I connected my USB flash drive that the transfer speeds were slow. So I tried switching to the other USB port and still found slow speeds, so I tried a different USB flash drive and still found very slow speeds, transferring a 1GB file to the flash drive was taking 3 minutes. Other things like connecting my iPod and syncing it took forever. When I check system profiler and USB, my flash drive and everything else shows that its connected as USB 2.0 and showing that max speeds should be 480 MB/s, so I am not sure what is wrong.
     
    MKang25, Sep 25, 2011
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  2. Bog

    Bog Losing it...

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    The max speed for USB 2.0, or any spec for that matter, is purely theoretical and is never even close to real-world usage. Forget about that.

    3 minutes for 1GB is about 5.5MB/s. Given this speed, it sounds like your USB drives are formatted to FAT32 or NTFS. I personally get 8MB/s max when writing to these file systems, so if that is the case your performance is normal.
     
    Bog, Sep 27, 2011
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