I have an Archer C7 with Lede 17.01.4
Made an backup of the settings through Luci.
Now when I want to restore the settings on this same Archer C7 (with same Lede version) it does not work.
I go to System --> Backup / Flash Firmware --> Restore backup and press the Choose file button.
Once I select my backup archive and press Upload Archive the device reboots and after a short while it's back online but none of my settings are restored.