Final answer:
The shift from floppy disks to USB mass storage devices is largely due to the relative advantage of USB drives, their compatibility with various devices, and their simpler use.
Step-by-step explanation:
The floppy disks being replaced by USB mass storage devices can be attributed to several characteristics of innovation. One major factor is the relative advantage of USB drives over floppy disks, as they offer more storage capacity, faster data transfer, and are more durable. Another significant characteristic is compatibility, as USB drives can be used with a wide range of devices and operating systems. Finally, a lesser degree of complexity in using USB drives contributes significantly to their adoption over the more obsolete floppy disks.