I'm confused. Google Drive app says I consume 5 GB of space, yet the folder on my computer is merely 90 MB big.
1 Answer
You're sharing storage amongst Google Drive, Gmail, and Google+ Photos.
Go to the web interface and hover your mouse pointer and you'll get a breakdown of what's using your storage:
Click the link and you'll get some more details:
As you can see, this matches up with what the Google Drive app is reporting: