Allow File paths in the SFTP directory name field

[SitesByYogi]

Feature is related to an issue with Remote SMTP directories in Total Upkeep https://wordpress.org/support/topic/remote-sftp-directories/. User wants to backup to his Synology NAS from the web server but the root of his SFTP isn’t writable so he would like to write the backups to a site specific folder within a ‘weekly-backups’ folder.

The problem is the ‘Folder name’ field for setting up the SFTP config won’t allow slashes and there’s no other field to enter a path to this ‘weekly-backups’ folder.

Describe the solution you'd like
We could add that functionality to the field that allows you to name your directory or create a new input field that would allow them to set a specific path