This SD was formatted to be a bookable media
What I want is to format again BUT this time with ExFAT Format, in order to read it in macOS and Windows, but I do not what Scheme to use
As long as you only need it to work with somewhat modern versions of windows, pick gpt. Guid partition table/map that is. It’s the more modern choice. If you need to support very old machines pick mgr; master boot record.