10. Sync
If you want to keep your files safe, secure and private, Sync is the perfect online storage for you. You can access Sync from anywhere regardless whether you are on your smartphone, laptop or tablet Windows or Mac. In addition to this, Sync is an online storage device that can backup your files anytime and restore any version of any file. One of the best features this online storage service is offering is the ability to share files with your friends even if they don’t have a Sync account. You can use 1000GB of this excellent storage service for $5 per month.