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Floppy and CD drives are both Output and Input devices based on the context of their usage. For instance, you know that both the drives can read and write their respective media, i.e. input and output. But consider the case where you insert a pre-recorded CD or write-protected floppy into the drive, here the drive falls-back to being an input device. Classifying computer peripherals into I/O devices only is not very efficient now-a-days due to the Hybrid nature of these peripherals. So instead, classifying CD and Floppy drives as Storage Access Devices is more appropriate. The term access here has significance, since the drives itself do not store any data as opposed to common parlance, instead they simply access the Compact Disk and the Floppy Disk for the data.
