This USB manager for SME Server-Manager panel is a great help.
wget http://mirror.contribs.org/smeserver/contribs/jppialasse/SME7/usbdisksmanage r/smeserver-usbdisksmanager-0.2-0.1.noarch.rpm
or alternate
wget http://www.pialasse.com/RPMS/smeserver-usbdisksmanager-0.2-0.1.noarch.rpm
Then run:
yum localinstall smeserver-usbdisksmanager-0.2-0.1.noarch.rpm
then go login and marvel at your new addition to your server manager.