Folder Properties and Archiving Rules
The folder properties contain any archiving rules for all files which are located in that folder.
To edit the folder properties:
locate the folder
click the blue edit arrow to display the Folder Properties:
The above screen shot displays an Auto-Archive rule of 60 months. This means that if any files which have not been updated for a period of 60 will automatically be removed from the folder and placed in the Archive area.
You may adjust the Auto-Archive period by changing the number of months, or you may remove the archive rule all together, by de-selecting the tick
Remember to click the Update button to save any changes.