virtualbox.org

I have registered my usb drives with my virtual machine, but the virtual machine does not see the usb drives in explorer. I have shared folders working ok between the host and the guest. I am using a PNY usb flash drive and a sandisk usb flash drive. Both work and are detected in the host. Not sure what to check at this point.

You may have to be more specific in the set up of your guest system. I believe the manual has detailed instructions but basically it goes like this: in SUSE go to a terminal and do an lsusb and find out how your USB devices show up in Linux. From that output you will have manufacturer's names and ID numbers which you will need in the set up of your VM. Now start Virtualbox and click on the settings icon for your VM. In the USB section create one or more filters for your devices. I have one for a Timex Datalink wrist watch which has four entries which I got from the lsusb output, vendor ID which is a four character hex entry 0CC2, the manufacturer, Timex Corporation, a name for the filter, which I named after the device name from the lsusb output and the product name which also comes from the lsusb output. My current output, without the watch but with a Sandisk usb drive looks like this:

Bus 005 Device 004: ID 0781:5408 SanDisk Corp.
Bus 005 Device 003: ID 0424:2504 Standard Microsystems Corp.
Bus 005 Device 001: ID 0000:0000
Bus 002 Device 001: ID 0000:0000
Bus 001 Device 006: ID 045e:0040 Microsoft Corp. Wheel Mouse Optical
Bus 001 Device 005: ID 413c:2002 Dell Computer Corp. SK-8125 Keyboard
Bus 001 Device 004: ID 413c:1002 Dell Computer Corp. Keyboard Hub
Bus 001 Device 001: ID 0000:0000
Bus 003 Device 001: ID 0000:0000
Bus 004 Device 001: ID 0000:0000

Perhaps an obvious Q, but I just want to verify that you are using the PEUL editions of VB and not OSE; and that you have installed PEUL Guest Additions on your guest VM? If not then USB won't work.