Digital platforms, as an example of digital tools for data handling, provide an entire cycle of working with data, from data acquisition, processing, and storage to visualisation and software simulation. The digital platform comprises a data storage and processing system that ensures compliance with data usage protocols by other modules of the digital application. Moreover, such data storage and processing systems should be adapted to multi-user work with large amounts of data, which are assumed to be part of the operation of the digital platform. The purpose of this article is to describe the design and software implementation of a data storage and processing system for a digital platform capable of analysing regional innovative development levels. The data storage and processing system was developed based on the data structure and features, as well as on the requirements for data operation. The development process is presented in the form of the implementation of sequential steps, starting with the analysis of the requirements for the data storage and processing system for the proposed digital platform, the development of an ER diagram, and an infological and logical data model. The description ends with a discussion of the software tools and the physical implementation of the system. This article discusses an approach to data storage system design based on the analysis of data features and structure, as well as the proposed algorithm for data handling. The approach offers the advantages of solution flexibility and scalability, as well as user convenience, which consists of a query structure adapted to the appropriate specifics.