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How do I authenticate my external hard drive?

macOS Sierra 10.12.6 (MacBook Air)

I am trying to move a directory/folder from my local disk to an external hard drive. But I get an error that says:

Modifying "Remote Disk" requires an administrator name and password

To move "<your-folder>", click Authenticate.

But I do not see any button or link labeled "Authenticate." Also, I read here there might be a solution involving right-clicking the destination drive then selecting "Get Info" button. However, there is nothing there I can click.

So how can I move this folder to my external drive?

Full screen capture movie .gif

Click here to see the full screen capture movie .gif.

Step 1.

Here is where I get the error message after attempting to move the folder.

Step 2.

The 'Get Info' window is no help.

What's the Filesystem of the External HD? Maybe NTFS? In this case the volume is mounted as ready only and you neeed a 3th part NTFS driver to write this kind of disks.

最后更新：2017-09-05 18:45:29

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