Not correct. When a “file” on computer’s storage medium (such as hard disk) is deleted, it is simply marked with a “deleted” stamp. Then that file becomes inaccessible to Windows Explorer. So the data in that file is alive.
However when additional activity is performed by the computer, it can OVER_WRITE on the space occupied by the deleted file. When that happens, it is almost impossible to recover the data from the deleted file.
There are also Apps available, such as Norton Commander, which can clean out all blank and deleted space on hard disk by over-writing many repeats of zeroes on that space. That is similar to bleach-pitting the deleted data.
However when additional activity is performed by the computer, it can OVER_WRITE on the space occupied by the deleted file. When that happens, it is almost impossible to recover the data from the deleted file.
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If the hard drive is big enough, it will be a long time before anything is overwritten, as new data is written to free space where it left off from the previous write, methinks.