Google Drive

Migrating Google Drive should be straightforward.

1. Install Google Drive https://www.google.com/intl/de/drive/download/
2. Configure both the Google Apps and the GMail accounts
3. Move the files and folders over

Issues without solution:

• Things that have been shared with you have not been shared with your new account. You may want to make copies of those, or ask owners to re-share.
• Things that you shared may disappear for others (can't find a link to identify those files or folders)