Please clarify why you would compare with 3 centralized solutions? My understanding of the others (Sia, Filecoin etc.) is that they break down the file and distribute segments of it across a decentralized storage community, Google et al merely distribute a full copy of your file across their global servers which simply provides some redundancy. Right now I don't see any big differentiators, other than Filecoin is still just an idea, the others at least have some form of working version. That being said thanks for your perspective.