Your question is Simple File System Design. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
Design a simple file system called 'workspace' with operations to insert, traverse, delete, and move resources.
Define the resource hierarchy, operation semantics, validation rules, persistence model, and behavior for invalid paths or conflicting moves. Explain how you would test correctness and preserve consistency.