fullBackupTo succeeds to unintended location
When using network resource strings with SystemRepository fullBackupTo,
it is possible for the backup to succeed, but to write to an unintended
location. Because a network resource string must contain two "!"s,
an NRS that contains an incorrectly typed keyword may cause a backup
to default to a file whose name includes the NRS string as typed.
Make sure your NRS syntax is correct and valid before starting a