You have 2 options:
Select Let’s choose Files: If you want to save your documents and sign in at the same time.
- Accept the permissions.
- Select the files.
- Enter your email or access to your Facebook account or Google account
- Enter your password.
Select Choose Later: To register your account before saving your files.
- Enter your email or access to your Facebook account or Google account
- Enter your password.
- To save your files, touch the + sign
- Accept the permissions.
- Select the files that you want to save