Hi Manish, Can you post a screenshot of how you configured the Update Data activity? Did you explicitly assign Recipients to the Profiles and Targets > Recipients folder?
When you write records, depending on the data type, they might or might not get assigned to a folder.
To determine if your records are in the database, you can create an 'All Recipients' view. Create a Recipients folder, go into the Folder properties, and on the Restrictions tab activate the 'This folder is a view' checkbox. Let me know if this helps! Linda