That big, top secret folder is exactly where Windows XP stores offline files. It's called the client-side cache. You don't really need to know where Windows XP stores these files, however, since they appear to be in the same namespace as when you're connected to the network.
Dig deeper on Windows Operating System Management
Related Q&A from Jerry Honeycutt
Have a question for an expert?
Please add a title for your question
Get answers from a TechTarget expert on whatever's puzzling you.