Correct Answer: A
A folder is a logical structure for storing files on a storage device such as a hard disk drive or a solid state drive. A folder can contain files or other folders within it. A folder can help users to organize, group, or categorize files based on their name, type, purpose, etc. Extension, permissions, and shortcut are not logical structures for storing files on a storage device. Extension is a suffix or identifier that indicates the format or type of a file, such as .txt, .docx, .jpg, etc. Permissions are rules or settings that determine who can access or modify a file or a folder on a storage device. Shortcut is an icon or link that points to the location of a file or a folder on a storage device. References: CompTIA IT Fundamentals+ Study Guide: Exam FC0-U61, Second Edition, Chapter 3: Computing Components, page 124.