Originally Posted by Katdragon
I can see the system folder but still no collections.jso - I'm running Vista and have turned off the "Hide protected operating system files (Recommended)".
The file is really collections.json - don't know why the name is getting cut off.
Have you actually used collections on your Kindle before?
If you have, then the file should exist. If not, then there won't be a file to backup. Disconnect your Kindle, then go to the Sort by Collections view to check, or just pick a book and add it to a fake collection - that should force the file to get created - then you can reconnect and check.