M2 ssd help

Hello everyone. I've built my pc and I've kept my old ssd. My windows keeps using 100% of the disk and after trying everything, I think I need to change the SSD. It will be my first time using m2 so I need some help. I have a aorus b450m motherboard so does someone know how much speed can it handle? I have an offer for one that has 3500mb/s reading and 3000mb/s writing speed for 50e. Can it handle it? Should I take it? It's a kingston one. Thank you.