Transfer Drive Content to Another Account - Google

Google Drive doesn’t have any service dedicated to its migration, so you need to move Google Drive files manually unless you use a third-party service. To migrate google drive to a new account, you can do this yourself, or you can engage users and give them directions so they can transfer their Google Drives themselves.
You can do that in three ways:

1. By downloading files from the old Google Drive and uploading them to the new one; 
2. By using the Sharing feature.

Option 1. Download and upload files in Google Drive

Step 1. Log in to your old account and create a new folder to store all files under the root directory of your Google Drive.
Step 2. Move all files to the new folder.
Step 3. Right-click the new folder, click the “Download” button, and wait for the process to complete.
Step 4. Log in to your new account, click “Upload”  to upload that downloaded .zip file, and wait for the process to complete. If you want to upload the folder, not the .zip file to your Google Drive, you need to unzip it first so you can click “Upload Folder” to upload it to your new account.

Option 2. Use the “Share” feature with Google Drive

The easiest way to transfer Google Drive files to a new account is by sharing them.
Step 1. Log in to the source Google Drive account. Select all files and right-click the “Share” button.

Step 2. Add your new account’s email address as a collaborator. Click the “Advanced” button, and the below window will appear.
Step 3. Click the “Down” arrow icon and select “Is owner” from the drop-down menu and click the “Send” button.

Step 4. Log in to your second account and you will find these files are placed under “My Drive” of your account.