WHERE DOES COMPUTER DELETED FILES GO?

              Well!!For the first time when you delete a file from the computer,it is moved to the TRASH(Linux and IOS) or to the RECYCLE BIN(Windows) .What is happening here is this Because the Computer only understand binary(0's and 1's) so when you delete a file a computer writes over some of the binary with 0’s replacing the 1’s  But Lets ask ourself,What if we delete or we Empty the trash or Recycle bin,Where do they go?
              Actually!! When you Empty Trash or Recycle bin, a computer deletes a file and it remove the reference to the file on the Hard disk drive  Once the file header, or reference, is removed, the computer can no longer see the file. The space the file took up is no longer reserved for that file, and any new file can be stored in that location...The part of the disk previously occupied by the file is not modified or overwritten and still contains the file data, but that data is no longer linked to a file name.And this is Why you can Recover files from disks
              But in case if you want to delete the file and not to be able to recover,You have to use some special tools that can do a low level format..