It seems to be a major firmware bug on one particular samsung SSD.
"Performance Restoration supports only the NTFS file system."
So on consoles the solution is to flash the fixed firmware (from a PC) and wipe the drive clean?
I have a bunch of Samsung 840 Evo ssd's and applied their performance fix without issue on pc, but I don't think it would work on a console file system because the fix only supports NTFS. It basically took a few seconds to flash the firmware, then it took about 30 minutes (on a 250gb ssd) to change the way all the data is stored to accommodate the fix, I assume that second step would not work on the console file system. Worse case though you flash the firmware which is really quick, wipe the drive and just re-install your games and saves on it.