It is a frequent requirement to copy large files to the cloud. In particular, OVF files for virtual machine images are very large. The problem with copying very large files, over 1G, with SCP is that the SSH pipe may break. This can be frustrating in the middle of a large copy operation. rsync can provide a solution to this. Unzip the large files on the source machine into a directory and run rysnc. It is a tool that keeps directories synchronized and sends the compressed changes over SSH. So if it does not complete successfully you can run it again multiple times and only the differences will be copied until, finally, both sets of directories will be in sync.
See the last post for more details of using rsync on the cloud.