What file types does Coinbase support?

As a cryptocurrency user, I'm curious to know the specific file types that Coinbase supports. Given that Coinbase is a major player in the crypto space, it's important for me to understand the file compatibility of their platform. Does Coinbase support traditional document formats like PDF or DOCX? Are there specific crypto-related file types, such as wallet backups or private key files, that Coinbase accommodates? Clarifying this information would help me better utilize Coinbase's services and ensure the smooth transfer of my digital assets.