I have an HP EliteBook 8570w laptop with Windows 7 64x, and I am getting a new laptop, so I want to sell my old laptop. I removed all my personal data, but based on my knowledge, users can recover deleted files. So I downloaded a tool named File Shredder, and I chose to shred the free space using the most aggressive approach "Gutmann 35 passes". But since I have 500GB free space, this process is taking too long. Can anyone advise if there is a faster way to shred free space? I thought of this approach: I have an SQL server setup files (size around 2 GB), so if I copy/paste this file multiple times till my laptop's hard disk become full, then I can delete those copies, so in this case I do not think anyone can recover anything. is this correct?
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