How much does snapshot costs ?

Hi,

I am really new to this unmanaged setup and being a noobe of Linux system, its really fragile for my setup when everything I do is new…

So before I modify anything, I prefer taking a snapshot, which acts like a fail safe restore point for me…

Now the question is, how much does snapshot costs ??

For example, if I take a snapshot and keep it for few hours till which I finish the modification and delete the snapshot if all ok ??

For this how much would I be billed ??

Thanks…