Yamaha S90 ES User Manual

Using USB storage devices

When using USB storage devices, make sure to connect them to the USB TO DEVICE connector, and follow the important 
precautions below.

■ 

Connect only a USB storage device (such as hard disk, CD-
ROM, flash disk and other drives) to the USB TO DEVICE 
connector. Other devices such as a computer keyboard or 
mouse cannot be used.
Both bus-powered (powered by the host device) or self 
powered (battery or external power supply) types can be 
used.
The S90 ES does not necessarily support all commercially 
available USB storage devices. Yamaha cannot guarantee 
operation of USB storage devices that you purchase. 
Before purchasing USB storage devices, please consult 
your Yamaha dealer, or an authorized Yamaha distributor 
(see list at end of the Owner’s Manual) for advice, or see the 
following website:

n Although CD-R/W drives can be used to load data to the instrument, 

they cannot be used for saving data. However, you can transfer 
data to a computer and save data to a CD using the CD-R/W drive 
on the computer.

■ 

When a USB storage device is connected or media is 
inserted, a “USB device unformatted.” message may 
appear in the LCD display, indicating that the device or 
media must be formatted for use. Execute the Format 
operation in the File mode (Page 168).

■ 

To prevent important data from being inadvertently erased, 
apply the write-protect provided with each storage device 
or media.
If you are saving data to the USB storage device, make sure 
to remove the write-protect.

Never turn the USB device’s power on/off and never 
plug/unplug the USB cable when the connected USB 
storage device is the self powered type. Doing so may 
result in the operation of the synthesizer “freezing” or 
hanging up.
While the instrument is accessing data (such as in the 
Save, Load and Delete operations in the File mode), 
do NOT unplug the USB cable, do NOT remove the 
media from the device, and do NOT turn the power off 
to either device. Doing so may corrupt the data on 
either or both devices.

There are two different types of USB connectors, and 
the rear panel of the instrument features both. Take 
care not to confuse the two.

This type is used to connect the instrument to a 
computer, and allows you to transfer MIDI data 
between the devices. The USB connection between 
the instrument and the computer can only be used for 
transfer of MIDI data. Unlike MIDI, USB can handle 
multiple ports via a single cable.
USB cables have different connectors on each end: 
the A type and the B type. Connect the A type to your 
computer and the B type to the USB TO HOST 
connector.

This type is used to connect the instrument to a USB 
storage device, and allows you to save data you’ve 
created to the connected device, as well as load data 
from the connected device. This lets you save the data 
created on this instrument to the external USB storage 
device and load the data from the external USB 
storage device to the instrument. Save and Load 
operations are executed in the File mode (page 168).
USB cables have different connectors on each end: 
the A type and the B type. Connect the A type to the 
USB TO DEVICE connector and the B type to the USB 
storage device.

n The computer cannot access the USB storage device 

connected to the S90 ES’s USB TO DEVICE connector, even 
if connecting as shown above. Only from the File mode on 
the instrument itself can you access the data on the USB 
storage device connected to the USB TO DEVICE connector.

n Though the S90 ES supports the USB 1.1 standard, you can 

connect and use a USB 2.0 storage device with the S90 ES. 
However, note that the transfer speed complies to USB 1.1.

MIDI data transfer

Connecting to a computer

Connecting to a USB 
storage device (hard 
disk, CD-ROM, flash 
disk and other drives)

Saving/Loading data in 
the File mode (page 168)

A type

B type

USB TO DEVICE 
connector

USB TO HOST 
connector