I have a long post, but for the sake of time I'll try and summarize the problem(s). Original drive, no partition, no windows Started with period freezing up, turned into continuous beach balling to frozen curser. The only solution was power down and restart. Happened surfing the net, watching movies. Then a blur of what I actually did in any particular order... Bought another external HD, backed everything up on TM. Copied some Time Machine files from one ExHD to another going through Finder. At some point it froze up and on starting back up I got the file folder with ?. Tried the CMD-R and some other steps, it would load halfway and then just hang or the while apple logo would disappear. Admittedly I was not patient enough and powered down and started over. One time I let it go for about 5 minutes and it started up. Tried to restore with TM... going through the process about 1/2 way it froze up. Tried to reload EL Capitan... could not find drive when it came time to select. Not sure if it was because I erased it or not??? I ended up putting El Cap on external drive and using the computer for a while. Eventually got to Disk Utility on the MBP, did first aid and then I did the CMD on start up.. Came to an older looking Disk Utility and I just moved El Cap from the Ex HD to the MBP Disk... it was a wipe and clean install. this is what I'm using now. At first it ran perfectly fine for a while, I connected an Ex HD and tried to do another TM back up… 20% into it froze and back to freezing and restarting and to Safe Mode, then first aid disk…. back to regular log in… as long as I don’t ask for any heavy work it seems to limp along. I can listen to iTunes. SO… how can I either confirm or rule out SSD failure? What else could it be? Did I mess it up doing the TM back up file transfers? Did I mess it up doing the El Cap install from the external drive? What things can I check? Test? If you suggest I do something, just pretend I am completely stupid about computer language and how to do it. Be some what descriptive. I can follow good directions. I’ve used this daily and put a lot of files through it, lots of movies and photos. I have not been easy on the drive. In the 3 years having Apple Care, top case, bottom case, logic board, battery and think keyboard and screen 2 times have been replaced. Lots of failures on this thing. A real lemon. But I know and accept SSD don’t last forever and willing to buy a new one and replace it. Just want to make sure that’s the problem. I’m in Thailand so not sure about getting the parts shipped. Should be ok. Thanks to all in advance and look forward to some thoughts and ideas.