Free OneDrive storage will decrease from 15 GB to 5 GB for all users, current and new. The 15 GB camera roll storage bonus will also be discontinued. These changes will start rolling out in early 2016.
If you are using more than 5 GB of free storage, you will continue to have access to all files for at least 12 months after these changes go into effect in early 2016. In addition, you can redeem a free one-year Office 365 Personal subscription (credit card required), which includes 1 TB of OneDrive storage.