Well what do you know. My C: drive is a SSD. It looks like its a 256GB one that has little space left. However, my D: drive has about 750GB of space free but isn't a SSD.
Check your motherboard to see if there is space for an M.2 drive and then go get a 1TB M.2 drive from Amazon for $50
https://www.amazon.com/dp/B09QV692XY?psc=1&ref_=cm_sw_r_cp_ud_ct_YK65TPAVH09ME4X3QA26if that 256 GB is in the M.2 slot you can have it transferred to the 1Tb drive, either a computer store can do it, or you can with an external m.2 drive connector.