For Google storage - you can get GSuite (https://gsuite.google.com/pricing.html) - $10 a user a month, for unlimited storage via Google Drive.

You can then mount the drive using DriveFS:

https://blog.google/products/g-suite/introducing-new-enterpr...

It's basically a FUSE filesystem built on top of Google Drive.

Alternatively, you can use the Drive Sync Client, if you want to just sync stuff back and forth (without a virtual FS).