Let me proceed step by step. The first sentence: "Da biste pristupili Google Drive-u, morate imati Google račun. Ako ga još nemate, stvorite jedan."
Here, "kraji" ("Zaključak") is a proper noun, so skip. "Google Drive" is a proper noun. "PDF knjige" is repeated. Maybe "knjige u PDF formatu", but not sure. The verbs like "pronašli i preuzeli" could be replaced, but need trios. "Zaštititi svoje datoteke" - "štiti" could have synonyms. pdf knjige google drive
Also, the instruction says to skip proper nouns. So terms like "Google Drive", "PDF" are proper nouns and should be skipped. Let me proceed step by step