afop is not recognising my ssd as an ssd

so i specifically bought a portable 200gb ssd for afop and i spent all day yesterday downloading the game onto it and when i opened the game today it does not recognise the ssd as an ssd it says it's a mechanical hard drive i'm not like educated on tech or anything but the product description SAYS ssd. do i have to buy one and build it into my pc or what???