There is a growing number of large-scale file synchronization and sharing services in the research collaboration network. In this contribution I will address the extension of the QA and Testing framework for the ownCloud-based services - called Smashbox - with benchmarking capabilities. I will cover the design of performance/stress-tests additions to the smashbox framework and usage of the web-based application to analyze generated results. The aim of this analytical tool is to allow collaborators to identify bottlenecks and benchmark the performance of their respective systems, also comparing results with existing commercial cloud storage services.