Google Drive is a safe place to back up and access all your files from any device. Easily invite others to view, edit or leave comments on any of your files or folders .
With Drive, you can:
• Safely store and access your files anywhere • Quickly access recent and important files • Search for files by name and content • Share and set permissions for files and folders • View your content on the go while offline • Receive notifications about important activity on your files • Use your device’s camera to scan paper documents
Google accounts get 15 GB of free storage, shared across Google Drive, Gmail and Google Photos.
For additional storage, you can upgrade to a premium subscription plan as an in-app purchase. Subscriptions start at $1.99/month for 100 GB in the US, and can vary by region.
But I recommend you to not purchase any plan. If you need more storage you can create one new gmail account to get another 15Gb free Google Drive Storage.