Yamaha MX88 Reference Manual page 63

Performance
Delete
Deletes a specific file saved to the root directory of the USB flash memory. After selecting the desired file, press
[ENTER] to execute the Delete operation.
Format
Formats the USB flash memory connected to the instrument. Before you can use a new USB flash memory with the
instrument, you will need to format it. Select "05:Format" in the top File display, then press [ENTER] to appear the
confirmation display. Then, press [INC/YES] to execute the Format operation.
If you format the device, all previously saved data will be deleted. Make sure to check beforehand whether or not the device
contains important data.
Memory Info (Memory information)
FILE*Memory*Info
Free=867.9MB/955.0MB
1 Free
Indicates the amount of free/total memory for the currently recognized USB flash memory.
MX49 MX61 MX88 Reference Manual
Son /Pattern File Utility
1
Remote
File
File display
Save
Load
Rename
Delete
Format
Memory Info
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