Opera Windows
Opera Folder + File Location in Windows
Preferences
C:\Users\t\AppData\Roaming\Opera\Opera\operaprefs.ini
Saved session
C:\Users\t\AppData\Roaming\Opera\Opera\sessions\autopera.win
Bookmarks
C:\Users\t\AppData\Roaming\Opera\Opera\bookmarks.adr
Opera directory
C:\Users\t\AppData\Roaming\Opera\Opera
Cache
C:\Users\t\AppData\Local\Opera\Opera\cache
Help documents
C:\Users\t\AppData\Local\Opera\Opera\opcache
Mail directory
C:\Users\t\AppData\Local\Opera\Opera\mail
User CSS directory
C:\Users\t\AppData\Roaming\Opera\Opera\styles\user