While it is a general rule of thumb to keep multiple copies of data files, it is also important to be sure your data is secure. When maintaining a balance between backing-up data and securing access to data files, it is important to remember an excessive number of backup copies can in turn compromise the security of the files. Information and Technology Services (ITS) advises keeping all data in OneDrive for Business, then syncing data files only to the necessary devices.
Recommendation provided by Michael Menne, Information Security Manager at Minnesota State University, Mankato
