You may remember Microsoft drastically cut the amount of free space it offers with OneDrive from 15GB to 5GB plus they removed the free camera roll bonus. This upset a lot of people especially those with large amounts stored in Microsoft Cloud.
The good news is that Microsoft have slightly back tracked and are now offering existing users the chance to keep the 15GB and camera roll bonus for free. To claim the storage you have to opt in at https://preview.onedrive.com/bonus/ and then you can keep your storage. You have to signup before the end of January and if you use OneDrive it is well worth opting in.
Thanks to Steve for the tip.