Definition of minifloppy in English:

minifloppy

Pronunciation /ˈmɪnɪˌflɒpi/

noun

Computing
  • A floppy disk of a relatively small size, originally 5¼ inches (17cm), later 3½ inches (21.5cm).

Origin

1970s; earliest use found in Datamation Magazine. From mini- + floppy.