Upgrade packages are stored in the database. Each of these upgrade packages requires up to 180 MB of database space, so you should delete the older software upgrade packages that you no longer need. You do not delete packages from the file system; they are only deleted from the database. Therefore, you can add them again if you need them at some future date.
Note:
Do not delete the packages that are installed on your client computers.
To delete upgrade packages
In the console, click Admin.
Under Tasks, click Install Packages.
In the Client Install Packages pane, select the package to delete.
Under Tasks, click Delete Client Install Package.
In the Delete Client Install Package dialog box, click Yes.