Chony,
It's not healthy for either. There is a small icon on the lower right corner of the screen that is used for this purpose. It looks like a green arrow over a rectangle. Double click the arrow and a box will open that provides the option that permits the USB device to be safely unplugged.
Gary
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Travlin' Easy
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PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!
K+E=W (Knowledge Plus Experience = Wisdom.)