I spent days, maybe even weeks, uploading my music to Google Music, and now that it's available for Google Apps users, I'd love to be able to transfer it to my primary google account instead of spending/wasting time doing it again. Is this possible?
Basically, you can't and I don't think Google has any plans to implement this anytime soon.
As of January 2013
You can move information from one account to another for the following products.
- Bookmarks (Export and import)
- Contacts (Export and import)
- Finance: Export and Import
- iGoogle (To transfer data, create your own backup and restore it to the new account through XML)
- Picasa Web Albums
- Places (bulk upload)
For any other product, transferring product information is currently unavailable. This may change over time, so check back here for updates. You may find that sharing options listed below may be helpful as well.
See reference: Moving product data