Errors while trying to copy files to UNC path using Powershell

Hello experts, I found the promising script below at the following link: [b][url=https://sqlactions.com/2015/03/30/powershell-script-to-manipulate-sql-server-backup-files/]https://sqlactions.com/2015/03/30/powershell-script-to-manipulate-sql-server-ba