Replace HDD wSSD, or add SSD to extra slot?

Computer SSD HDD Rack 4 Slot 3 Slot 2 Slot Aluminum Hard hdd slot HDD refers to Hard Disk Drive, which contains platters covered 4x Hot Swappable ” SATA HDD Bay with RAID 0, 1, 5, 10 Support; 2x cm8 slot 2 2242 SSD ; Dell Fast Response Free Fall Sensor and HDD Isolation

fort knox slot machine review Hi, i want to upgrade my pc with an SSD and want to identify if i have a vacant slot to put one in, and if yes, what type of slot it is,