, then the adjustment you need to make is on the cable that runs by the spring on the side of the door that touches the ground first. Your door is unbalanced.
It's an easy fix.
The cables attach at one end to the bottom of the door, up over a pulley, then thru another pulley held with a clevis to the spring, and then to a fixed point. At or near this fixed point there should be some type of adjustment fixture/hardware. What it is depends on the type of door and manufacturer.
What you need to do is raise the door as high as you can (higher than it normally rests), and then clamp a good sized pair of vise grips onto the track to hold the door up into this position.
Now the springs aren't under load, and you can safely tighten/adjust the cable to take up the difference in the balance of the door. It may be a small adjustment, or it may take a few tries, but this is the way it should be done.
Also, if you have an automatic opener, you must disconnect the door from it. And unplug it lest someone hit the button while you are working on it and cause great problems,cussing, and or harm
. Usually this is done by removing a pin from a swinging arm that attaches the opener track to the door.