SOS. - Volume button- , does not work

I hope someone can help me … Turns out the button stopped working volume -, volume + works only as reset and continues to perform well.
Some solution.
thank you very much

You might try manually reapplying the latest firmware (available at the top of this forum) and see if that helps–the firmware can become corrupted sometimes. 

Do what you say, as usual volume down button does not work

I didn’t think it would, as we have heard this problem before. But no harm was done in trying it. It is a hardware problem, and unfortunately is generally un-fixable.

Was hoping it was not a hardware issue . . . .

But if you still are within the warranty period (1 year U.S., 2 in the EU), SanDisk will replace . . . .