Google Drive – How to Transfer a Collection to a Google Apps Account

Put every thing into one folder, right click that folder, press share, then add the person you want as the owner. After sharing it with them press the little tab beside their name and click "Is Owner".

Your Google Apps admin has not allowed users to receive documents from outside your domain.

One of the sharing options you can set for Docs & Drive within a Google Apps account is weither or not users can share documents to people outside the organisation. One sub-option of this is that they can separately allow or deny users from receiving outside documents

As the administrator, you determine whether users can share their Google Docs (documents, presentations, spreadsheets, and drawings) outside your organization, whether they can access docs created outside your organization, and the default visibility level for new docs.

If you are the administrator of the domain you can change the settings via:

1. Sign in to the Google Apps administrator control panel.
2. Click the Settings tab and then select Drive and Docs in the left column.
3. In the Sharing options section, choose whether users can share docs outside your organization.
4. Hit Save

I'm not sure if this is on or off by default but just ask your admin if they can allow outside sharing. Worst case is they will say no because of X.