Most of them keep their details in their mobile phone for keep up these documents depends different types apps. Sometime you need to copy files into another apps it may lose your files and time. Migrationapp is web service that will help you to transfer all the Gmail, Drive, Contacts and Calendar data from one Google Apps account to another. The service offer more secure and fast data transfer. You can sign it on your existing Google account.
Migrator for Google Apps uses the IMAP protocol to transfer data. As such, IMAP must be enabled in the source and destination accounts. Migrator offer Single Migration and Batch Migration single migration from one account to another. Batch Migration means migration of multiple accounts at the same time. You can also Purchase Additional Migrations.