Hello colleen201,
If you haven't done so already, try making a persistent /home for Knoppix in an external USB drive. A laptop hard drive in an external USB enclosure will give you lots of hard drive space for saving files in. Even a USB memory stick is big enough for saving settings and bookmarks and that type of thing. Here's my blog about it, http://users.bigpond.net.au/hermanzone/p20.html