Nextcloud is a free app used to access your data across any number of devices. The system gives the option of storing your data on their online servers, your own physical drives or a combination of the two. Nextcloud also has a wide variety of advanced features with a focus on privacy and security, many of which will require an understanding of database management. While there are simpler options for online storage and retrieval, Nextcloud is a great choice due to their commitment to security and community involvement.