SD Express Capella Technologies SD Express uses the Internet to provide secure, remote access to HP LaserJet printers and MFP devices. With SD Express, authorized users can print to compatible HP devices across the street or across the globe without the expense of dedicated network connections or the complexity of VPNs, and with no modifications to their applications. This hardware-based solution leverages advanced data encryption to protect documents from misrouting and unauthorized access and alterations, making the SD Express solution both a more secure alternative to faxing and a faster alternative to courier services.