How do I connect Google Drive to Storage Studio?
Short answer: Open Cloud Accounts, click Add Account, choose Google Drive, type a nickname and click Open browser to sign in. Pick your Google account, approve access, and it's added — no Google Drive app needed.
Open Cloud Accounts → Add Account, choose Google Drive, type a nickname such as personal-drive, and click Open browser to sign in. Pick your Google account on Google's chooser, approve access, and the account appears in your list.
Google always shows its "Choose an account" screen, so you can pick the right account even if you're already signed in to another one in your browser. Once the green check appears, click Done — or Add Another to connect a second Google account.
If Google shows "This app is blocked", see that error.