It would be smart to always have a hard copy of all records in case something were to happen to digital files. Once digital files are completely gone, there is no easy way to get them back, if at all. Medical records are very important to always have and should be treated more cautiously than most information.
There are modern encryption methods that are very secure and the data is able to be stored on a more easily retrievable platform. Having valuable information stored only on floppy disks can be stolen or destroyed by natural disasters or fire. There are modern storage methods that are superior to floppy disks.
No, U.S. doctors should not use floppy disks until they are proven to be more secure. The medical practice is a hard science; therefore, to rely on the assumptions of others is to ignore the research that will help make informed decisions. If Norway's doctors can prove floppy discs are more secure, then U.S. doctors may reconsider at that time.
Floppy disks are all but extinct in the U.S, it would be a waste of time and money to revert back to them. While in some ways they may be more secure, they do not hold much data and would be more trouble than they're worth. More efforts must be invested in modern technology to keep sensitive medical information secure.