An announcement set uses approximately 15 MB of disk space. For each announcement set your disk stores, you lose approximately 1 hour's worth of storage space for user voice data.
Typically, you need to remove an announcement set immediately after you have tested and activated a replacement announcement set.
Note Do not remove the standard announcement set unless you have a backup of the set. You might want to restore the standard announcement set at a later date.
To remove an announcement set: