I am routinely getting the "running out of disk space" error and want to upgrade my laptop.  I have been out of the computer repair loop for years (since the only storage was the hard drive itself) and I am not sure what the better and faster types of hardware are for upgrading my system as there seems to be a lot of options out there now.  I would sure appreciate opinion on this.  Money is an issue but I also would like to invest in something I won't have to upgrade in the next year or two again and I do need something that will support online gaming. 

Thanks, and I have listed what came with my system below. 

Storage: