If you mean you're out of disk space on your computer, then you should do something about it NOW! Not tomorow or the next day. A theme is only a couple of megabytes and nobody should ever allow their hard disk to become so full . In fact I can't believe it. Your computer needs heaps of disk space to do normal housekeeping chores. I'm inclined to think you're confusing an out-of-memory problem with something else. If you can't download a theme, then something else is stopping you.