How to manually backup with local files?

I'm using a Chromium browser that doesn't support Google sign-in, so I can't backup to Google Drive. Does anyone know what local file(s) I can backup to achieve the same effect? I already tried backing up C:\Users\[me]\AppData\Local\BraveSoftware\Brave-Browser\User Data\Default\databases\chrome-extension_eggkanocgddhmamlbiijnphhppkpkmkl_0\10 ("10" is a file with no extension) and restoring it after making changes, but that didn't seem to work, even though opening the file looks like it has all of the expected data stored in it.

I'm not really sure what else to try, so I thought I'd ask here, even though it seems like this project is no longer developed, which is sad because it's amazing.

Thanks in advance if anyone has any help!