My son is 19 and will be moving out soon. He has grown up with his AppleID attached to ours. How can he establish a separate ID with his own payment info, etc. and yet keep the apps and music he has purchased. Or does he lose everything?
Click here to see how to 'Create an Apple ID' = create an Apple Account. --> https://support.apple.com/HT204316
Merging Apple Accounts or transferring data is not officially supported, nor can it be done easily or completely.
Apr. 2018 post by ASC helper Winston Churchill on transferring data from one Apple ID to another. https://discussions.apple.com/message/33333380#message33333380
Feb. 2021 tips from Eric Root https://discussions.apple.com/thread/252468781?answerId=254653802022#254653802022
Look into using Family Sharing to continue to be able to use items purchased with one Apple ID with other Apple IDs.
Family Sharing - https://support.apple.com/HT201060
Set up Family Sharing - https://support.apple.com/HT201088
Breaking off a child ID into a separate adult ID
