A process is described which permits particularly rapid writing and reading of small files, such as e-mails and scanned documents, for legally relevant WORM data storage which preserves evidential integrity. The process is implemented using currently available operating systems and standard hardware, wherein the disadvantages of these operating systems in the processing of many small files and the insecurity of the data storage are overcome by the architecture of the hardware and the implementation of the process.In accordance with the invention there are on a first hard disc (4) an operating system (5) and also WORM server software (6) with an API (12), a second hard disc (7) serves as a work area and cache, wherein the secured data are loaded onto mass memory units (11) in content storage containers (CSCs), using the WORM server software (6) access rights are configured, CSCs are loaded, the number of files is reduced and secure storage is carried out.