I have both a PC (work) and my new Macbook Air. I am having issues with opening files that I have saved on my USB Flash Drive. The files are not corrupted because it works on my PC perfectly. Could someone advise how to fix the issue?

Please help!!!

Yes, I have the MS Office software for MAC that I bought from the Apple Store.
This is the Error.
Excel Cannot Open this File.
The file format or file extension is not valid. Verify that the file has not been corrupted and that the file extension matches the format of the file.
- I created these files on my MAC, but I have worked on it on my PC. But I can't reopen it on my MAC anymore.
Thanks All for the help.

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You can find the full version of the current Firefox 28.0 release in all languages and for all Operating Systems here:
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read about same here:
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