Well, it could b that the external media got corrupted because you ejected it
before all the data blocks had been written, or it could just be that the
computer got confused.
In any case, try real hard to eject your media first. Open finder hit
command-shift-C to bring up a list of attached devices and find your external
media and hit command-E. Then you need to wait until the device disappears from
the list.
Best wishes,
Jonathan Cohn
> On Feb 10, 2018, at 11:13 AM, Antonio Guimaraes <anto...@accesstoplaces.com>
> wrote:
>
> Hi all,
>
> I have been using a new USB hub to connect devices to my computer. While
> connecting a USB thumb drive, finder only sees the thumb drive until I remove
> it without ejecting it. After that, finder does not list the drive once it is
> inserted, but it does give me an error message to eject the drive first
> before removing it.
>
> It doesn't matter if the drive is inserted directly or through the USB hub,
> but this seems to happen after the first eject error involving the USB hub.
>
> Why is this happening?
>
> Any help is appreciated.
>
> Antonio
>
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