Out of the blue
After his collaborators stared into the clouds together, they dart an angry glance at him.
At the end of the semester, a group of students worked on a final report for a study course. They edited the document together in an iCloud Drive and were about to complete the assignment. One of the students deleted the report in the belief that it was an old draft. At that time, there was no data recovery feature, and the group had to rewrite the report from scratch. It is not surprising that the other group members were not to keen on their fellow student during this time.
The example shows quite well that storage in only one place is not sufficient to ensure secure data retention. In general, data should be backed up according to the 3-2-1 rule. Accordingly, there should be at least 3 copies of the data on 2 different storage media, one of which should be stored in an external location. In addition, when working together in a central location, you should be especially careful when removing/deleting files.
Source: personal communication