I have an external usb harddrive and on 2 windows 7 hosts (one 32 bit and one 64 bit) and both suffer from the same problem. If I plugin my usb harddrive when the OS has booted the harddisk is not seen by the host OS nor by the guest. Nothing happens.
It will show up on the host as soon as I stop the VMware USB Arbitration Service (and Workstation service too). If I then plugin the drive it is seen immediatly.
The drive is only working if it's plugin before the host OS is started. Anyone else? I remember a thread flashing by but because I hadn't used my external drive for a long time I haven't noticed this bug/feature