Google Drive is the best option for online backup I am using this app since last one year and I really satisfying by it because it gives us 15 GB free online storage where we can backup our files , photos and videos I have used 1.5 gb of my storage I have attached a screenshot of that storage.
Here your uploaded files are fully secured no other can see your uploaded photos and videosif you want more storage for backup than you can buy it also.
Layout and design : the design of this app is well.
features and functions : we get many useful features and functions in this app like we can star to our uploaded files we can search our files easily in it.
Usefulness : this app is really very useful for them who looking an app for online backup.
So at last I suggest you that if you are searching for an online backup app then this app is one of the best choice for you.
I had given it 4 star because I think that this app needs some improvements.