Not a good idea, rather use [this howto] to mount a drive permanently (Mounting an external drive using UUID and fstab | Linux admin junior)
Power save, could slow things down, but should just power back on when uploading files.
To check if and where drives are mounted I use:
sudo df -hT
In Linux to mount a drive one uses
sudo mount /dev/sda1 /media/drivename
But you enabled automount so should not need to manually mount unless you add more drives to your system.