I’ve upgraded my Mackbook Pro Mid-2012 about almost 2 months ago. I bought a 16Gb RAM and an Samsung 850 Pro 256Gb SSD, but I haven't enabled the TRIM function until today. In the meantime, I’ve written a lot of data in the SSD and then deleted them (I even upgraded the OS X for the new El Capitan) and noticed that he is using much more RAM now for performing even simple tasks. Today, I've enabled TRIM and I want to format the disk to perform a clean install of the new OS X El Capitan. I just want to know one thing: By doing this (with the TRIM enabled now, of course), the damages that the SSD may have suffered will be restored? Or the damage is irreversible? Thank you for all your help!