RingCentral call recording files

Hello.I understand that call recording files are held by RingCentral for 90 days before being deleted.We are trying to get our RedBox system set up to archive these calls. As a contingency we are looking at SFTPing them before our 90 day limit hits. Does anyone know if I start downloading them now via SFTP they will be flagged on Ring Central's system as being downloaded already, or deleted? I don't want to interfere with our potential system which is in development but am a bit concerned that we may loose files if not sorted soon. Many thanks