Move backups preparation to new volume with more space

The backups fail because the disk was full, and the process need more disk:

write /dev/stdout: no space left on device

We add a new volume with 400Gb to perform the backup:

/dev/sdf        393G  118G  256G  32% /mnt/HC_Volume_100261000

and this MR adapt the backups scripts to the new path.