To save some operational cycles your system doesn't usually bother with truly erasing the files you moved to Trash or Recycle Bin. In most cases the space the files occupied is just marked as available, and the new data may be stored in those memory sectors any time. But the data you need may still be there. So when your files got deleted, and you need them recovered, act fast. Ideally, stop using the hard drive, connect it into an external docking station, and boot from a different system disk or computer. Then connect the external drive with lost data.
Disk Drill knows hard drive data recovery. With multiple available file recovery algorithms, you are on your way to free hard drive recovery. Disk Drill Basic for Windows
lets you restore up to 100MB without paying for the premium edition.