SSD Not Recognized, Internally or Via USB

How many ways do I have to say IT IS NOT RECOGNIZED BY THE COMPUTER??? How do I format a disk that the computer does not recognize as even existing???

I have no reason to think it does not work, I typed that it is not recognized and asked how to format a disk when it is not recognized, your response was to format for Mac, this is exactly what I mean by replies that do not explain anything, I kinda had that part figured out, that any drive used under a Mac OsX would have to be formatted with a Mac format. There appears to be nothing wrong with the drive, Windows has no problem formatting it under NTFS, after that is done I will try what KimUserName suggested (and see if it is even recognized by Disk Utility after Windows puts some sort of formatting on it). Perhaps you could read the entire qeustion before replying next time, Csound1

Csound1, thanks for taking a shot at helping with my situation, sorry to sound like I was dumping all over your reply but it really was the unuseful sort of reply I mentioned in my original post, I asked how to format a drive that El Capitan failed to recognize and you replied to format if for Mac. It is not faulty, when you told me to "buy a drive that works next time" I did not know that to be the problem and suspected otherwise so I was looking for information on what to do with a working drive that my OsX won't play with. There are a lot of cogs in this chain and I figured the problem was with one of the other ones (and it was - I'm getting somewhere).

Alright, I will watch that video, but I am getting somewhere. You mentioned that I should use and enclosure, I don't have one, I have a powred cable with the SATA interface and a USB cable. However, I tried taking out the original hard drive and replacing it with the (NTFS-formatted) SSD, after setting my MBP to boot form the other external drive, which contains a clone of the original hard drive. This has worked, in so far as I am in El Capitan, and now Disk Utility does recognize the SSD. I'm guessing I have to erase, then probably after doing so I will be able to reformat (of course, I'd select Mac Extended ((Journaled))).

Yes, I have heard of this being a solution in some cases, that will be my next step but up until now it was not recognized at all, by my MBP, so I've been trying to figure why that is so I can test whether the rest of the BUS will play with this SSD. It is recognized internally now, so once I get it formatted for Mac I will have a better idea if I can use it with the rest of the architecture I have or if I need to buy a new SATA cable.

Thanks

Thanks to all who replied, for the record, and for the benefit of those who have a similar problem (seems there are more than a few) the drive was fine and it is up an running as an internal drive on my MBP. What I ended up having to do is format it in a Windows machine first, after which it still was not recognized as an external drive my my Mac. However, once formatted in NTFS, when I booted from another external drive (with the machine's original hard drive cloned to it) my MBP recognized it internally, using the original SATA cable. With this drive, and I also doubled RAM to 8GB, my computer runs quite a lot faster.