What creates them? There is over 1GB of files and I need to free up some space on the C drive ASAP.. Can I change the location they are saved to another drive? Can I delete them?
You don't give much information as to what type of files they are, but on my server, they are catalog files, which is how Windows Backup keeps track of what is on each backup set. You can probably purge the older ones.
To free up space, I would do this:
http://windirstat.info/ (it is free)