The PDF will save to your computer's default download folder. You can then upload it to Drive using Method 1, OR:
Open the app and sign in to your Google account. --- Save You Pdf Google Drive
Tap Upload (Android) or Upload & Scan (iOS). The PDF will save to your computer's default download folder
Open any PDF in your Chrome browser.
Click File → Download → PDF Document (.pdf) . --- Save You Pdf Google Drive