It is difficult to determine which country in the world has the most need for self storage facilities as it depends on a number of factors, such as population density, the availability of housing and storage options, and the overall economy.
That being said, the United States is currently the largest market for self storage facilities, with an estimated 50,000 to 60,000 facilities throughout the country. This is due in part to a number of factors, including a high level of consumerism, a mobile population, and a large number of people living in urban areas with limited living space.
Other countries where self storage is becoming increasingly popular include Canada, the United Kingdom, Australia, and Japan. In these countries, similar factors such as high population density, limited living space, and a growing need for more storage options have contributed to the increasing demand for self storage facilities.