u/Kobiash23

My external hard drive fell from my coffee table. When I plugged it in, the light came on and it did not make any weird noises but my computer could not open any of the files or copy them to another drive - although I could see the files and folders. I downloaded Disk Drill and the first scan found no problems and sent me to a byte to byte copy or something. I am doing that now and most of it says “bad blocks” - what does that mean and what should I do?
About 1/4 of the files were not backed up and they are my family pictures for the last 4-6 months. :-/