Yes. Connect your drive and wiki and the written record flows in, sources and permissions attached. But seed lightly and let live work do the heavy lifting: the freshest knowledge comes from meetings and chat, not the archive.
The archive is worth having: past decisions, policies, and specs give Heidi historical depth. Just do not let 'organize our documents first' delay the connection; Heidi ingests mess, that is rather the point.
One genuinely high-value seed: anything that explains why, decision docs, postmortems, strategy memos. Those are the facts that make her answers sound like your company instead of a search engine.