SSD (Solid State Drive) and Hard Drive Disk are not the same. Please see this video to understand the difference.
For example the hard drive on my Acer notebook has 300 GB capacity. I bought it used on eBay for $50 delivered to my home. How much will a 300 GB SSD cost?
Last year I bought a Toshiba desktop with SSD and Windows 10. the capacity of that SSD was so pathetic, the OS took up most of it, and my application software had no room to store it on SSD. I returned the computer for full refund.