Last week Google Drive was down due to a software bug during a scheduled maintenance event. According to Google the issue affected up to 33% of all user requests.
Complaints were popping up quickly across social media outlets like Twitter as there was no available redundancy for users to access their data.
Google later stated direct links to data it were still accessible but it brings up a good question about data accountability and whether or not cloud-based storage is the right answer for small to medium businesses. Private data backup solutions avoid this issue by having each user backup to their own device, not a shared cloud.