It seems that the content related to the work can neither be modified nor deleted, so I have to reopen the explanation.

The mighty author has retrieved the data from the USB flash drive! Sure enough, we can't be lazy, we can't just rely on experience to speak, and we will make new discoveries if we try it.

The principle of file overwriting is twofold: 1) change the state of the physical space occupied by the "overwritten" file to writable, and 2) copy the overwritten file.

Important: The overwritten file is not really "overwritten" on the physical address of the overwritten file. Overwriting and deletion are actually the same thing, the original file is only "deleted" (i.e., becomes writable in the physical space state), not "overwritten", so both can be recovered.

If there are book friends who are not careless and make the same mistake as me, share your experience. A lot of data recovery on the Internet is a cracked version, although it can be used after downloading, but it is limited to scanning, and once you want to recover, you will have to register and buy. The most convenient and easy-to-get data recovery software is 360 Security Guard, the "file recovery" function is just that, fast and easy to use - the most obvious is often the most overlooked, before you know it, 360 has developed so many features, thumbs up!