Linux fails on fatal IO error 2

One would hope google does it right, but still I'd tend to keep a local backup as well. In addition to the data loss issue you also need to consider the possibility of loss of network access (either on your end or anywhere between you and the cloud servers) due to either network breakdown or ddos attacks if timely access is important to you. If your work is confidential you also need to consider security (usually lacking on cloud sites, possibly lacking but more under your control on your site ).