We published an article on SSD forensics in 2012. SSD self-corrosion, TRIM and garbage collection were little known and poorly understood phenomena at that time, while encrypting and compressing SSD controllers were relatively uncommon. In 2014, many changes happened. We processed numerous cases involving the use of SSD drives and gathered a lot of statistical data. We now know more about many exclusions from SSD self-corrosion that allow forensic specialists to obtain more information from SSD drives.
more here.........http://forensic.belkasoft.com/en/ssd-2014
more here.........http://forensic.belkasoft.com/en/ssd-2014