Hi
The person who said the hard drive is failing is correct. I wouldn't be doing anything else with the drive except to make a Raw copy to a drive in good condition. Don't try running recovery software on the drive only on the copy. The reason for this from the speccy report TOSHIBA MK6476GSX SATA Disk
05
Attribute name: Reallocated Sectors Count
Real value: 1,248
Current: 40
Worst: 40
Threshold: 10
Raw Value: 00000004E0
Status: Good
This is not good and will get worse the longer you use the disk.
Either send it to a recovery company OR you could using a Blank usb 1 TB drive or larger make a raw copy of the failing drive then run recovery software on the USB drive.
Do you have another computer available you can use to do the copy if not you will need to make a usb pendrive to boot the computer and make the copy.
If you have another computer to attach the drives to you can use disk copy from here
https://hddguru.com/software/HDD-Raw-Copy-Tool/If you need to do it on the laptop then perhaps use ddrescue boot from here
http://www.system-rescue-cd.org/Bottom line..... don't keep using the drive and if you need data from the drive make a raw copy first and then do the recovery from the copy only.