If you're is also running out of space in Gmail, and your thinking to migrate your Gmail Data to your G Suite, then this thread will properly answer your question, Most people are using Gmail for a very long time, and their storage is going to be full. That is happing because Google allows a normal user to store emails and other data up to 15GB.
So we have found a solution for it to Migrate your Gmail to G Suite using Cigati Gmail Backup Tool. This tool is specially designed for Gmail users that run out of space. It helps users to migrate Gmail to G Suite efficiently. Moreover, this wizard is competent enough to save attachments separately. This utility helps to remove duplication from the desired emails before the migration process.