I am planning on migrating my website from one server to another. Since this website is for my business, I don't want there to be a time frame where customers will land on an empty page.
I tried uploading the files via FTP to the server without having the domain being pointed to the server, but the server won't grant me access, even with the proper login credentials.
Is there a way to upload files to the new nameserver without having the domain name being pointed to it?