Hello,
How could I compare two non-encrypted routerBoard backups to check config. differences? OS v7.3.1
I managed to unpacked it using https://github.com/BigNerd95/RouterOS-Backup-Tools
How could I read what is inside IDX and DAT files?
Or is there any straight forward way?
Cheers!
A.
Open the original device from where the backups coming from.
Make a new backup.
Export that backup and put it on a safe place (not the routerboard itself).
Copy the first backup you want compare and restore it.
After reboot, /export file=1stbacup.rsc
Save the file outside the routerboard.
Copy the second backup you want compare and restore it.
After reboot, /export file=2ndbacup.rsc
Save the file outside the routerboard.
Copy back the original backup of the routerboard, and reload it.
Now you have two file 1stbacup.rsc and 2ndbacup.rsc and you can compare it with apposite programs.
He wanted straightforward. 
And no, unfortunately there currently isn’t.
¯_( ͡° ͜ʖ ͡°)_/¯
I would have done so…
I had to do a comparison of .rsc files several months ago and used a linux / KDE program called “Kompare”. Optimal !
There’s no problem with rsc files, it’s just text. You can use anything that compares text files (file compare function in Total Commander works great for me). Or if it’s from same router, you can put exported rscs in some version control system like git, and even have history when exactly something changed. But binary backup is different beast, you can’t do much with that.