Why can’t I read all my files on an external drive using my Macbook Air?

February 17, 2014
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Hello all,

I recently sent my MacBook Air for a backup at my local Apple store. Since, when I want to look at some pictures/videos I have on my external disk, only a few pictures can be opened. The others, when clicked on, show the following message:

You do not have permission to open the document X; contact your computer or network admin. for assistance.

But being the only user on my mac, I should be the admin.

So what’s it all about? And what do I have to do to be able to see all my files without having to go through every document?

Thanks a lot!


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