Google drive provides cloud storage solution and it is accessible everywhere by login to your Gmail account and comes with generous 15 GB free storage space ($1.99 per month for additionally 100 GB) which allowing you to online editing, cloud syncing from smartphone , Build-in OCR. Google drive App also available in iPhone and Android platform.
If you do not want to manage backups yourself, then you can consider following managed backup services, which will cost a few dollars a month and offers manual and automatic website backups:
Backup Machine: free backups, including automated daily website and database backups.
Codeguard: it offers manual and automatic website backups including malware detection and alert features.
Amazon Cloud S3 (Simple Storage Service): 5 GB of free cloud storage ($99 per year cost with subscription)
In my opinion, A cloud storage is a perfect place to keep your website backup. schedule your backups at least once a day to avoid disruption.
Learn more here:
https://goo.gl/PqcSs9
