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I have Windows 7 64bit Host system, and I am using VirtualBox 4.1.18 (r78361).

I have an Arch Linux Guest OS.

I have installed VirtualBox Extension Pack (to enable USB2 support) and added my USB device filter to VM.
I have also installed the Guest Additions provided by Arch: virtualbox-archlinux-additions (but I have no idea whether it's actually needed for my environment).

I can see my USB device from VirtualBox Devices menu.

Whenever I am trying to access it, I end up with:

Failed to attach the USB device Kingston DT 100 G2 [0100] to the virtual machine Archlinux.

USB device 'Kingston DT 100 G2' with UUID {a836ec33-0f41-4ca7-a31d-09cceaf5d173} is busy with a previous request. Please try again later.

Details
Result Code:    E_INVALIDARG (0x80070057)
Component:      HostUSBDevice
Interface:      IHostUSBDevice {173b4b44-d268-4334-a00d-b6521c9a740a}
Callee:         IConsole {1968b7d3-e3bf-4ceb-99e0-cb7c913317bb}

From what I have googled, most guides shows how to solve this the other way around - Linux Host to Windows Guest.

How do I resolve this?

Update

I have tried to Eject (virtually, not physically) the device from my Windows Host system and then try to access the Device from Guest. Same error.

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up vote 3 down vote accepted

After an hour of googling and experimenting, I have found the answer.

https://www.virtualbox.org/ticket/3033#comment:30

It looks like VBox has some problems with USB3 hubs, and so, plugging my USB key into an USB2 slot did everything.

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