How can I see the content of my USB in QubesOS

I saved some files on my USB before installing QubesOS, I would like how I can view them.

Do you have sys-usb qube?
If yes, then you can attach your USB storage from sys-usb qube to any other qube using Devices Widget in system tray and use it there:

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Forget it, I was able to solve it, thank you very much.