How to store uploaded images via portlet preference view in Liferay

Question

I'm gonna develope banner rotator porlet in Liferay, that will have preference view (Configuration view), from where admin could manage banner rotate images, uploading them from computer and setting its title and description.

My question is, where should I store uploaded images and its informations? My banner-rotator portlet initially will be empty. I want images be related to liferay portal, not portlet itself. Is there predefined liferay documented way I should follow?

With short words, I need to store images, images title, images description

I use liferay 6.0.5