HD Enclosure with ASmedia ASM2464PD. Need SSD Advise

My MacBook Pro 16 with M1 Pro is running out of storage.

I have order myself a Maiwo K1717 USB4 (Some say is TB4 but dont have the license or something) enclosure with the ASmedia ASM2464PD chips.

I am looking for SSD recommendations! Anyone use similar Maiwo enclosure? Which SSD did you use?

Also, does anyone know if the Maiwo enclosure uses PCIe 3.0 or PCIe 4.0?

I am totally lost when come to NVme M2. SSD selection. Just so many out there.