You can use fdisk to have an idea of what kind of partitions you have, for example:
fdisk -l
Shows:
Device Boot Start End Blocks Id System
/dev/sda1 * 63 204796619 102398278+ 7 HPFS/NTFS
/dev/sda2 204797952 205821951 512000 83 Linux
/dev/sda3 205821952 976773119 385475584 8e Linux LVM
That way you know that you have sda1,2 and 3 partitions. Now theThe -t option is the filesystem type, meanstype; it can be NTFS, FAT, EXT. So inIn my example, sda1 is ntfs, so in my example it should be something like:
mount -t ntfs /dev/sda1 /mnt/
USB devices are usually vfat and Linux are usually ext.