Hello
Is there any script for making configuration backup of several routers in the dude and save it in a special location?

You can't really have The Dude do any kind of backups / configuration management.

If you want a solution that just works, check out Unimus.
No need to configure anything on the routers.

Takes about 15 minutes to deploy to manage a network of 1000 devices.
(assuming you can mass-import devices)

You will also get the ability to do change management (see a diff of what changed in between various backup points), network-wide config search, etc.

You can also check out Rancid or Oxidized as alternatives.