The 'problem' is that most SSDs don't necessarily erase data when you 'delete' something. SSDs have a number of 'tricks' that make them subtly different to har

The 'problem' is that most SSDs don't necessarily erase data when you 'delete' something. SSDs have a number of 'tricks' that make them subtly different to hard drives, which include things like: * Only whole 'segments' of the drive can be 'cleared' at a time, meaning the actual removal of data may not occur until some time after the file is no longer accessible through the file-system * Often SSDs will have 'over provision' meaning that although your drive is labelled "32Gb", it might have more than that available physically (e.g. https://www.kingston.com/en/ssd/overprovisioning https://www.kingston.com/en/ssd/overprovisioning). This is used to augment the capacity as areas of the drive degrade over the life of the drive. See http://arstechnica.com/security/2011/03/ask-ars-how-can-i-safely-erase-the-data-from-my-ssd-drive/ http://arstechnica.com/security/2011/03/ask-ars-how-can-i-sa... for a bit more on this topic.