Right - “failed to save storage configuration” seems to be an anaconda error message - I’ve not had that myself … but Google suggest someting like:
https://forums.centos.org/viewtopic.php?t=61999
“error checking storage configuration” . I went into the setup and set the system reserve partition through the centos installer to standard partition and then mounted it with /boot/efi. I did not reformat it and I still got the same results. As this was puzzling me, I started thinking if this had something to do with the Secure Boot.
Turns out it had to do with the settings of the CSM (Compatability Support Module). The launch CSM was set to Enabled so I switched it to “AUTO”. The message “error checking storage configuration” went away and I am now able to continue with the installation.
is that by any chance related to you machine?