How to look for files in nginx elsewhere?

Question

Nginx

Please help with Nginx config.
It is necessary that if the file is not found in the target directory - look for it in another directory.
Those. if it was not possible to find
sitename.com/folder/filename.ext
give
stename.com/defaultfolder/sitename.ext
In this case, the folder can be anything.

Answer 1

location / {
      try_files $uri $uri/ @storage;
    }

    location @storage {
      rewrite ^/.+/(.+)$ /defaultfolder/$1;
    }

Answer 2

try_files ?