4.5.1.d

I'm using the backup from the admin page.

I've only been able to backup to the /tmp directory. Everywhere else gives me the following when I click on "Confirm Settings":

Backup directory does not exist, and could not be created.
Backup directory exists, but is not writable.

Among other things, I have tried to create /home/CRM, owned by root:root and chmod 777, or even rwxrwxrwt (same as the /tmp directory). I have also tried a link to that address. Any ideas?

Thanks.