Need advice on ssd size for older laptop

Hi guys

Sorry for posting in general discussion, please move to a more appropriate section.

I want to clone my failing (chirping) hard drive in my laptop with an ssd. I’ve just watched your excellent YouTube video using partition magic.

My question is what capacity of drive should or could I buy with this laptop. HP Pavilion I3?

The current drive is showing 928gb.

Thanks in advance.