Collection / Qtec / Qtec EX-520 5.25" Diskdrive Qtec EX‑520 5.25" Diskdrive Qtec EX-520 5.25" Diskdrive Qtec EX‑520 5.25" Diskdrive Qtec EX-520 5.25" Diskdrive Specifications Catalog type Input device Manufacturer Qtec Release Date January 1980