pass-through usb storage

The easiest way to access any kind of mass storage is to forget USB, and access the device as a shared folder.
See section 3.11 of the user manual.
Make sure to remove all USB filters. You do NOT want to try both methods at the same time.

pass-through other usb

connect USB device to a guest

Socratis’s famous USB Fix List:
1. Make sure that the Extension Pack is installed on the host. The same version as VirtualBox.
2. Make sure that at least USB 2.0 is enabled in your VM settings.
3. Create a USB filter in your guest settings while the device is plugged in the host.
==Delete all values except Name, VendorID and ProductID==
zie usb architecture
4. Unplug the device.
5. Start your guest (the one that you applied the filter to). Let it start completely. Log in if you have to.
6. Plug your device. The filter should capture it and pass control to your guest.

troubleshooting

1. If the device shows up in your host and is not captured by the filter, either the filter is incorrect, or there might be a problem with your filter installation.
   2.If the device shows up, but as unavailable, “eject” it from your host (if you can), but leave it plugged in. It should show up as available.
   3.Shut down the VM and now zip and post the log.
   4.Are you by any chance using a USB 3.0 port/device?
   5.Is the VirtualBox USB Driver installed in your host? Make sure your host didn’t silently reject non-MS drivers (Google for Driver Signature Enforcement).
   6.Check out these Windows-specific ways to troubleshoot potential driver installation issues:
   a.USB not working https://forums.virtualbox.org/viewtopic … 04#p176270
   b.SOLVED: Failed to access the USB subsystem on Windows 7 host https://forums.virtualbox.org/viewtopic … 41#p195973
   c.Remove Driver Filters to Resolve Device Manager Errors on Windows 7 http://www.faqforge.com/windows/remove- … windows-7/

7.Post the output of the following commands:
VBoxManage list usbhost
VBoxManage showvminfo “Your_Virtual_Machine_Name”