I was informed by Amiel Mendoza during a Facebook chat, he said that the OneDrive, the free cloud storage service of Microsoft, formerly known as Sky Drive, is now offering additional 15GB to all OneDrive users.
All you have to do is activate the auto upload from your mobile device's camera roll to OneDrive. Usually, OneDrive offers 7 GB and then an additional 3GB.
But for this time when people got problems updating their Apple devices to iOS8, many users free up lots of space to accommodate that 5GB free space requirement during installation. Many Apple users were forced to delete some apps and also some media files.
This is where OneDrive came to the rescue. If your iCloud or any other free cloud storage service is already full and you want to have more cloud storage like the free 30GB of One Drive, then all you have to do is download the OneDrive app in your Android, iOs or Windows ready devices, then activate the cameral roll to OneDrive cloud auto pilot upload.
Then after some clicks...you'll noticed that OneDrive already gave you 15GB extra space and that's a total of 30GB cloud storage. The extra 15GB space is totally free for old and new users of OneDrive.
(news source: http://www.pcworld.com/article/2686566/how-to-double-your-free-onedrive-storage-to-30gb.html )