I am using Google drive since a long time and here is my experience with one of the most useful app by Google,
I use google drive mainly for backup images as it provide 15GB FREE online storage to the every person who has a gmail account.15GB storage is more than enough for storing your important images that are associated with your memories.
The concept of the app is so amazing and its layout and design make it so easy to use.
I store important document and PDF’s and some attachments. Rather than this you can store music and also videos. You can also make folders in your drive and can use it as your online SD card.
It has many useful feature. The offline view is very appreciable feature that enables us to view our stored data without data connection. I like the feature of sharing data with another account. Also we does not have to backup on daily or weekly basis, the autobackup feature handles it perfectly and also backup selected folders by us.
Usefulness- it is a very good app and everyone should use it who have fear to lose their important data.