ESI can be stored in every type of electronic media including hard drives, thumb drives, computers, handheld devices, backup tapes, and optical disks and includes e-mails, voice-mails, instant messages, text messages, documents, spreadsheets, databases, file fragments, metadata, digital images, and digital diagrams. Evidence of destruction of ESI or failure to produce ESI during E-Discovery can lead to costly penalties, sanctions, and potential loss of the lawsuit through declaratory judgment.