Technically you can do whatever you want, it's your money. However, there are stipulations.
I'm gonna assume it's pre-tax, as most 401k plans are.
If you wanted to take the money and put in a a savings account, you would have to withdraw the money from the 410k. It's not a transfer. So if you are under the age of 59.5 it's a premature distribution. Which means, it can be subject to a 10% irs tax penalty on top of the taxes you owe on it.
As mentioned above, you can transfer it to an ira account. But if you are still working for the company it doesn't make sense to do that.