Not really clear, neither the symptoms nor what you did:
- tried to access
- files would not list
- folder is accessible
- contents is not accessible
- changing ownership

Did you try to TAKE OWNERSHIP of folder and files?
Did you try command mode (dir, attrib, xcopy)?
Did you try what a Ubuntu Live CD thinks of it?

Remember: having one copy only (the original) = having no backup. That's a pity. 1.66 GB is less than half of a burned DVD. Would have been a good investment of your time.