Windows 8 does not use isolated storage, for example, sliverlight / Windows Phone - instead, the written files are simply written to a special folder assigned to the application (for each user).
In particular:
C:\Users\[name]\AppData\Local\Packages
( ), - , . .
C:\Users\[name]\AppData\Local\Packages\91e643e0-f4a2-4e96-99cd-b1f1b13897aa_te6ss58atez9j