This guide, or rather a documentation, is my attempt to help make sense of those files that you may find in your Opera profile or preferences folder.
The information that I have gathered and provided below has no connection to Opera Software ASA and is the work of many bored hours spent online by yours truly.
To find out about a file or a folder simply click on it to open a page with more details.
…/opera/
cache
dictionaries
icons
images
mail
opcache
sessions
skin
styles
temporary_downloads
thumbnails
toolbar
vps
widgets
autoupdate_response.xml
bookmarks.adr
browser.js
cookies4.dat
download.dat
fontswitch.ini
global_history.dat
link_queue_myopera.dat
link_queue_out_myopera.dat
lock
notes.adr
opcacrt6.dat
opcert6.dat
opera6.ini
operaprefs.ini
opicacrt6.dat
oprand.dat
opssl6.dat
opthumb.dat
optrb.dat
optrust.dat
opuntrust.dat
override_downloaded.ini
pluginpath.ini
search.ini
speeddial.ini
tasks.xml
typed_history.xml
upgrade.log
urlfilter.ini
vlink4.dat
wand.dat
widgets.adr
