If a package that you want to deploy is a file that was
downloaded to a client computer, you must upload the package from
the client computer to the target application server.
Procedure
In the Migration Manager application, select the Upload
Package action.
Specify the name of the file and click OK.
Increasing the package size upload limit
The default size limit for uploading a package to the application
server is 20 MB. You can change the limit by editing the Migration
Manager presentation XML file.