Is SCP supported by DriveHQ? 

Or must I use SFTP? I'm using a small embedded system that currently doesn't have ftp enabled.

I don't think we support the SCP protocol, which is an outdated protocol now. We support FTP, FTP over SSL (FTPS, FTPES) and SFTP. For transferring files and drive mapping, we also support WebDAV.  Please note many SCP programs support SFTP and/or FTP (e.g. WinSCP), thus they work with our service.

 Thanks.  Good to know.  I'll make sure SFTP is available.