Because I tend to forget this is a simple way of mount a USB drive in Raspbian. Remember we are working with FAT/FAT32 formatted drive and permissions are handled differently in the case of a FAT drive permissions are not supported .
First we need to find out how the system views our drive and partitions .
pi@raspberrypi:/mnt/usb $ ls /dev/sd* /dev/sda /dev/sda1
Create a mount point for the drive .
$ sudo mkdir /mnt/usb
Now that we know our drive is /dev/sda and the partition is /dev/sda1 we can proceed to mount . By making use of umask=000 we allow read, write and execute for all .
$ sudo mount /dev/sda1 /mnt/usb -o umask=000
Once mounted you can view the newly mounted drive and start writing to it .
pi@raspberrypi:/mnt/usb $ df -h Filesystem Size Used Avail Use% Mounted on /dev/root 15G 11G 3.7G 75% / devtmpfs 459M 0 459M 0% /dev tmpfs 463M 4.0K 463M 1% /dev/shm tmpfs 463M 7.1M 456M 2% /run tmpfs 5.0M 4.0K 5.0M 1% /run/lock tmpfs 463M 0 463M 0% /sys/fs/cgroup /dev/mmcblk0p1 63M 21M 43M 34% /boot /dev/sda1 30G 16K 30G 1% /mnt/usb