Thank you both for your help.
I still have a hard time getting into the 'System Volume Information Folder' on this laptop using Windows XP. But I have not tried Windows 7. The folder is on my data drive, not the system drive. So I do 't understand why Windows is so fussy about letting me in. Only using Linux can I look inside.
Anyway, I was able to make by data backup. It was another problem. It seems thee was
a loose nut between the keyboard and the chair.