1. This is not an SSD...it is a Toshiba convio spinning hard drive
2. If it was dropped, the logical conclusion is that there is physical damage to the drive surface and/or heads
3. The more it is on, the more damage it is likely causing to the surface of the drive
If you value your data, send it to a data recovery professional before doing anything further. If you don't value your data, you can try to get a clone of the drive.