My screen freezes while attempting to access my floppy drive?

Some non-program expansion cartridges included a sound/voice Synthesiser (which led to the CoCo being used as an accessibility device for the disabled), 300 Baud Modem Pak, RS232 pak, a hard drive controller, stereo music adapter, floppy disk controller, input tablet, and other accessories. The CoCo was the first Tandy computer to have a mouse available for it.