In 2J Gallery component settings you can see option “Path to Images Directory” here you can specify custom path for images upload folder. Important Note: in the case if you already have some images uploaded to the gallery and you decide to change path then after upload of the new images to the gallery you will see only images which loading from current, new location , images which was uploaded to the old location will be not visible any more in extension. So best solution : do not change this path when you already start usage of the gallery and you have upload some images.