User blog comment:Dragonjet/KC3改/@comment-29382046-20170809164244/@comment-29735334-20170810063854

By default (or so I think), KC3Kai will store back up data under your computer's "Downloads" folder, under "Kancolle", under "Backup".



Within the "Backup" folder, you will find files with ".kc3data" extensions. These are your backup files (in my case here, I have made two backup files at different dates).



Copy these files to the computer you wish to load it into, and use KC3Kai "Data Import" function (which is also in the Strategy Room's "Data Backup" tab) to apply it. Yes, you will need to have KC3Kai extension already installed in the other computer, and you will need to locate the backup files manually, so remember where you copied it to.