If you are looking to organize your custom samples into the Kontakt browser or create professional .nicnt files, here is the most reliable way to approach it. What is Kontakt Library Creator?

Sample Management:

The tool simplifies the creation of .nkc (data) and .nkx (sample) files, which are essential for Kontakt to read large sample sets efficiently. Official Alternatives for Professional Development

Multi-Platform Support:

Current versions are reported to work on both macOS (including native support for Apple Silicon) and Windows systems. The Role of KLC in the Kontakt Ecosystem

Where to Download Creator Tools Legally:

• What you get: A library that works in the full (paid) version of Kontakt.
• What you don't get: A library that works in the free "Kontakt Player."
• The Consequence: Libraries created with the free KLC will run in "Demo Mode" in the free Kontakt Player, meaning they will time out after 15 minutes. They cannot be serial-registered in Native Access.