USB KEY - IMAC TO WINDOWS

Hi!
I search to understand why each time a connect a usb key in the iMac to put some mp3 and after that, connect the same
usb key to windows 7 on my laptop and each time, it's said that the usb key have security and i can readonly the usb key...
not able to format, or write or copy files on the usb key...
someone know the reason?
Thanks!!
Martin

Allo it's okay!

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  • [SOLVED] Attempting to boot from USB key in UEFI mode

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