SSDs can be a problem when there is another spinning disk involved - which is normally a desktop setup

you have to unplug the spinning drives before win 10 install will recognise the SSD - but after you have installed win on the SSD you can plug the other drive(s) back in

if you run diskmgmt.msc and it can see the drive , then you can extend , delete , format the partition etc

if you are not sure how to use it - do a youtubr search