This is the data manual of YAMAHA PSR-A1000
The Yamaha PSR-A1000 is a musical instrument that utilizes floppy disks for data storage. Before using the unit, users must read the safety precautions regarding electrical shock, fire hazards, and proper handling of the AC adaptor (PA-300). The manual advises keeping volumes at minimum levels when connecting or disconnecting components to prevent damage.
The PSR-A1000 accepts both 3.5" 2DD and 2HD type floppy disks.
Yamaha recommends cleaning the head about once a month to maintain optimum working order.