You can view prior storage by adding the previous storage address as a new entry to the Watch Data view.
To add a previous storage address to a Watch Data item, right-click the storage address in the Name column of the Watch Data view and select Previous.
A new row is added to the Watch Data view. This new entry will start at the new address that is hex 600 bytes prior to the current address.
Note: Alternatively, you can click the View toolbar icon
on the Watch Data view and select Previous from the drop-down menu to add the previous storage address.