Try connecting the USB hard drive to the Mac or Windows computer and share it from there.
Mac
http://wdc.custhelp.com/app/answers/detail/a_id/3788/session/L3RpbWUvMTMzMTM5OTM1MC9zaWQvSkl5S2JMU2s%3D
Windows
http://wdc.custhelp.com/app/answers/detail/a_id/3787/session/L3RpbWUvMTMzMTM5OTM1MC9zaWQvSkl5S2JMU2s%3D