I just realized that backup has been failing since end of January, error reported says the backup directory is unavailable although nothing changed in my network setup or whatsoever.
In addition, I got unable to re-create the scheduled backup to the same dir because access to the share now fails without any detail. The ‘This PC’ icon that would allow me to browse to the directory (which is local to the PC I am running Roon on) is missing from the template. See below.
Thanks for your prompt answer. I just created a new share for the folder itself and setup permissions so it is accessible to everybody, read/write without any password. I also had to change the permissions on the very folder itself (independantly from the share) before adding the share in Roon backup gets successfull.
It is quite surprising it all worked successfully before end of January …