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USB drive / invalid format or extension

zorro55000 Posted messages 24 Registration date   Status Member Last intervention   -  
Clarckos Posted messages 10078 Registration date   Status Contributor Last intervention   -

Hello

I have several xls / xslx / doc files that I can open, except one that says it might be damaged and I get a message: format or extension not valid

even though I use this file often, except today

thank you

1 answer

  1.
    Clarckos Posted messages 10078 Registration date   Status Contributor Last intervention   939
     

    Hello.

    This can happen when the transfer from the original folder to the USB drive didn’t go well, or when the USB drive was unplugged too soon.

    The ideal would be to go back to the source to, in the first instance, verify that this source file works correctly, and then re-transfer the file from the source to the USB drive.

    If possible, right-click > properties on the file and tell us the file type displayed in the window.

    Thank you

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