Virtualbox 支持 exFAT

On EL6:

yum install -y http://li.nux.ro/download/nux/dextop/el6/x86_64/\
nux-dextop-release-0-2.el6.nux.noarch.rpm

On EL7:

yum install -y http://li.nux.ro/download/nux/dextop/el7/x86_64/\
nux-dextop-release-0-5.el7.nux.noarch.rpm
yum install exfat-utils fuse-exfat -y

参考资料：
CentOS上挂载exFat U盘
https://www.jianshu.com/p/285cd90727fb