The issue is not the SSD Drive you have but the interface it is on. That is the biggest limiting factor of the system 95% of the time. Next is the OS, as it has to do the task and then verify it. Though this is done quickly, the slower the CPU of the machine, the slower this operation - it is not instantaneous. 

Now, with SATA Card and an SSD, you should see much faster transfers but you still have the slow CPU finishing up the task.