Extend USB cable over the air?

I've once connected a Usbstick to my router and used it as drive to save images from various devices
Martin Senoner

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This is a possibility if you want to give access to a USB stick. In our
case we need point-to-point communication between devices.

Your use case is the use case 4of4 in the following article:

Thomas has describes 3of4, which seams to be the right one. But not with
an ethernet cable, we need a wireless over the air connection.

Happy hacking!
Patrick