Rough things into fresh

Whenever I solve any questions I do them in a rough copy but later on I write the same things again in the fresh copy with beautiful handwriting and customizing all the mistakes
But it takes so much time is there anything from which I can save time

Do your draft work neater?
When examiners are marking your work, they aren't going to care too much how neat it is as opposed to whether it's clear, whether you have everything down, and whether it's the right answer.
Under exam conditions, you can't spare the time to do everything neatly (and I don't think anyone would expect you to), but it needs to be clear and legible. You are also working against the clock, which means you will be short on time as it is. Time is of the essence, and speed without haste and carelessness is kind of key.

Shall I stop making rough copies 😓 basically I'm confused

Make your rough work neater the first time round so you don't have to copy and do it the second time.

Basically I make rough copies because initially when I solve questions then I make mistakes so I use another copy to write the same things again into the note copy so that I can avoid the mistakes and bad handwriting

No I completely understand. I'm used to be like that (kind of still am), but under exam conditions you don't have the time to do that. So what I am saying is that you should do the workings clearly in your answers the first time round, even if it takes an extra 5 seconds per question for example.

But whenever I will make mistakes on the question then how shall I do corrections by writing in the same copy or in the different copy?