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If you would like to transfer the information from your school account to a personal Gmail account, follow the instructions that Google has provided. They have provided a tool that simplifies that process. Details can be found at:
https://support.google.com/accounts/answer/6386856
Please make sure to login to your personal gmail.com account in either an incognito browser window, or a different browser. You cannot be logged in to both accounts in the same browser, otherwise you'll get a message saying "Transfer Your Content is only available to authorized G Suite for Education Accounts. Please contact your administrator, or sign in with another Google Account."