Myth 1: When files are deleted they are gone forever.
Fact: When files are deleted they are actually only removed from an index. Unless you then overwrite those sectors with new data, the files will still be there. If you delete a file it is important to stop using the computer. Even browsing the internet causes cache files and images to be downloaded to the hard drive, potentially overwriting the deleted files.
Myth 2: Putting a hard drive in the freezer will bring it back to life.
Fact: This is an old one, which will not die. We have never had to put a hard drive in a freezer. There is only anecdotal evidence that freezing a hard drive helps in any way. One of the most common types of hard drive failure is firmware corruption, which cannot be fixed in a freezer. I would be worried about introducing condensation into the drive, which could be devastating. If anyone knows where this idea came from, or how the freezer is supposed to help, then I would love to hear about it.
Myth 3: The FBI can recover anything.
Fact: The FBI are bound by the same laws of physics as we are. If a hard drive has had a head crash, and scraped the magnetic coating off the platter, there is no data left to recover. You cannot read magnetic data from particles of dust! Even the FBI can’t recover that.
Myth 4: The best way to recover a hard drive is by swapping the platters out.
Fact: In almost all cases, you should not disturb the alignment of the platters. They are manufactured within strict tolerances which cannot be recreated outside of a manufacturing environment. If the problem lies with the on-disk firmware, electronic components, or read / write heads, then swapping the platters would not solve anything.
Note – If the spindle motor gets stuck then it can be necessary to swap the platters, but only as a last resort.