Duesseldorf, Germany  - Sensitive data should not be stored online, Germany's PC Praxis magazine reported.

Most groups offering online storage do not encrypt data, it added and while some promise to use encryption, customers cannot always verify that claim.

Therefore, only non-critical data should be stored online.

The magazine tested seven online storage services. Caleido's Wuala scored the best marks. Experts were especially pleased to see that user data was encrypted directly on the user's computer. (dpa)