1. Find mounted media:

root@debian-yu:/etc# mount |grep media
/dev/sdb1 on /media/kiyoshi/0D34-FE56 type vfat (rw,nosuid,nodev,relatime,uid=1000,gid=1000,fmask=0022,dmask=0077,codepage=437,iocharset=utf8,shortname=mixed,showexec,utf8,flush,errors=remount-ro,uhelper=udisks2)
/dev/sdc5 on /media/kiyoshi/HD-WIU2 type fuseblk (rw,nosuid,nodev,relatime,user_id=0,group_id=0,default_permissions,allow_other,blksize=4096,uhelper=udisks2)
root@debian-yu:/etc#