Many times, we need to completely delete a file from your computer or use marks. In simple terms, there are several ways we delete the file, which means we can achieve completely delete a file or use of marks purpose?
1. Right-deleted files. Does not completely erase the file. Because Window System to avoid the user accidentally deleted files, right when we simply deleted the file, the file is actually not really deleted, just put the trash. Users can always restore accidentally deleted files in the Recycle Bin.
2. Delete File + empty the Recycle Bin. Users no longer see the files and the Recycle Bin can not restore files, but does not completely erase the file. Because the system after deleting files and empty the Recycle Bin, or simply the disk space the file is released into a free space, specifically, only the disk space for files marked as idle, no longer occupied, however, the contents of the original file still remains in the disk space. Through a special file recovery tool, disk space is still possible to residual contents of the file recovered again.
3. shred files. You can completely remove files. Grinding tool can completely remove through a dedicated file, because when you delete a file shredding tools, will rewrite the contents of the file and then delete multiple passes of random data, so that the file can not be restored even if they are recovered or is invalid disorder the contents of the file, so as to achieve the purpose of completely deleted files.
However shredding documents, the operation is to delete the file completely delete the file. For a file has been deleted, there is no way to completely remove it? The answer is yes:
4. Disk Wipe. After a simple delete a file, the file becomes a free disk space. Disk Wipe is the principle of random data several times by rewriting all the free disk space, content will remain in the disk completely rewritten in order to achieve the purpose of the file can not be restored.
Disk wiping tools a lot, here to HardWipe tool, for example, briefly explain the specific methods:
Download Hardwipe Tools
After downloading and installing, run HardWipe
Note that, HardWipe very powerful, can clear the sub-volume disk directly, which is equivalent to completely remove the partition (including the useful files and data), such as the D drive, so be sure to pay attention to select Erase option, so as to avoid erasing the entire partition, irreparable consequences.
We just want us to have deleted files can not be recovered, so only need to choose to erase the disk free space, so here choose "Free Space".
选择我们需要擦除哪几个分区的空闲空间。由于我们想全盘擦除，所以选择全部分区。确认。
回到主界面，提示我们“Clean free space now?”，随时可以进行空闲空间的擦除。如果我们希望更安全地擦除，可以选择我们擦除的模式。默认是Random Data，能满足一般的需求，如果希望擦除得更干净，可以选择“GOST R 50739-95”甚至“DOD 5220.22-M”，当然花费的时间将更长。用户可以根据自己的需要来选择。
选择完成后，点击Start开始擦除空闲空间。
视擦除模式、空闲空间大小及磁盘的性能而定，擦除过程将花费数十分钟到数小时。
擦除完成后，已经删除的文件就再也不能被恢复了，达到我们的要求。