1. Unmanage the IPS from the SMS so you can perform operations from the LSM (web interface) on the IPS.
2. If required, export (from the IPS) and then delete (in the IPS) any old System Snapshots that are taking up space.
3. If required, export (from the IPS) and then delete (in the IPS) old packet captures that are saved on the device.
4. Delete old TOS versions that are saved on the device (you may want to keep one of the old versions).
5. Return the IPS back to SMS control.