Transferring from Hard Drive to SSD very slow, HDD dying?

[pRoMiT]

Earlier today, I transferred about 20 GB worth of files from my SSD (boot drive) to my HDD, it transferred fairly quick. But later in the day, viewing these files were very slow, so I decided to transfer them back to my SSD. But it's telling me that it's gonna take more than a day, and transfer speeds fluctuate from 0 KB/s to 700 KB/s. I was wondering if I could get some help.

 

[CountMike]

Check HDD https://www.hdsentinel.com/download.php

 

[seagate_surfer]

pRoMiT, run Seatools on the HDD and see what the result is.