Udiskie
From ArchWiki
Udiskie is an automatic disk mounting service using udisks. It can be used for mounting CDs, flash drives, and other media. It is simple to use and requires no configuration.
Installation
You can install Udiskie by using the udiskie package that is found in the official repositories. Start the Udiskie service by adding:
udiskie &
to your xinitrc file, before the window manager is loaded.
Once Udiskie is running, all removable media will automatically be mounted under /media under a new directory that matches the device name.
Unmounting
Use the udiskie-umount command to unmount media. For example, for a device named "MY_USB_DRIVE":
udiskie-umount /media/MY_USB_DRIVE
Or, you can unmount all media with the command:
udiskie-umount -a