This question already has an answer here:
- Custom setting Setting type not visible 2 answers
I'm working on a Partial copy sandbox with a standard System Administrator profile User. Why can I only create Hierarchy Custom settings? In production I can create list Type custom Settings with the same User.
I couldn't find any related info in either the Custom Settings limits : https://help.salesforce.com/articleView?id=cs_limits.htm&type=5
or Defining custom settings help :