It is a legal requirement for a limited company to store and maintain the register of members. This register is an important documents that provide a comprehensive record of the company's ownership. 

If you have access to your registered office address (i.e. if you are using your home address or business premises), then it is a great idea to keep a physical copy stored there, so shareholders and directors have easy access to it. Alternatively, some companies choose to store their register of members electronically - this is common if you are using a virtual office as your registered office. This involves creating digital copies of the registers and storing them on a secure and reliable electronic system. This can be a cloud-based storage platform or an internal server. Storing the register electronically can offer benefits such as easier access, faster retrieval of information, and reduced risk of physical damage or loss. Regardless of the chosen storage method, it is important to ensure that the register is kept up to date, accurate, and secure.