No matter if it is actually a mobile telephone memory card, U disk, or hard disk, and so on., the da

file recovery is: after the delete operation, no additional information is usually written

Disk storage principle

The principle of disk storage is extremely very simple, which is, soon after the storage medium is energized, the action in the magnetic field generated by the electric field arranges the constituent units on the storage medium in line with the binary information into which the file content is converted. The file name we see is really the details in the starting in the data.

Principles of file deletion

Soon after the file is written, the arrangement from the storage medium doesn't modify. Only when the file is written once more will the preceding arrangement be changed. File deletion only deletes the information in the beginning of this file, to ensure that the technique can not recognize this file. But free unlimited data recovery software from the file still exists around the storage medium.

So: data recovery is really to restore the file header information

Provided that the information just isn't written once more, it may be restored

Baidu, data recovery software , you'll find lots of information recovery computer software readily available, you also need a card reader.

Hope to help the topic.