This storage unit has a size suitable for balcony and courtyard corners, offering efficient storage space that can easily accommodate garden tools, sports equipment, and daily miscellaneous items—its internal space can also be equipped with shelves and hooks to achieve orderly and categorized storage. It is made of prepainted galvanized steel plate that undergoes multiple anti-rust treatments, and is equipped with a sealed waterproof roof and wind-resistant structure; compared with wooden or plastic storage sheds, its metal material has higher strength and durability, being less prone to deformation, cracking, and fading, requiring less frequent maintenance, which saves time and costs and makes it a reliable choice for long-term outdoor storage. It is not only a storage space but can also be transformed into a temporary tool room, a small studio, or a pet house, meeting diverse demands such as family gardening and outdoor leisure and enhancing the utilization rate of space. With a modular design, complete accessories, and graphic and textual instructions, it requires no professional installation tools, allowing two people to complete the assembly quickly; its door design with lock holes facilitates the entry and exit of large items while ensuring storage security. Boasting a fashionable and versatile appearance, it features a simple design complemented by schemes that easily blend into various outdoor settings; the ventilation holes at the bottom prevent moisture and odors, balancing practicality and aesthetics, and adding a skylight window allows sunlight to shine directly into the room, eliminating the need to install a separate lighting fixture.