Files/folders backup plan shows Individual files selected in Items to back up section, instead of showing paths to files.
This is by design behavior when more than one machine is included in the backup plan.
When you apply the same File-level backup plan to several devices then the selected folders disappear from the main backup plan view and instead Individual files selected is displayed.
This does not affect the backup operation.
To find out which files/folders were selected when the plan was applied to the device, you can open the Activities of the device, choose the Backing up subactivity and you will be able to see the selected folders.
To be able to see what files/folders are selected for backup directly on Backup tab, it is recommended to create individual backup plan for each device.