This is why you should never manually format your /system partition. If your rom flash fails, you have no OS to boot into. I really dont know why so many people still say to do this.
You need to either use Odin to flash your firmware, or download another rom (or your previous one) and flash it from TWRP. Youll have to plug your external SD Card into your computer and copy it to there, then put the card back in and flash.
Its worth a try I think. But otherwise do you have a way to plug your sd card into the computer? You could copy a rom to flash im recovery that way.
If not youll probably need to try installing different drivers. You can get plenty to try from the link in my sig.
I usually say to just follow the instructions in the OP of what you are trying to flash. If they tell you to format system, I would ignore that part unless they have a good explanation for why.
You can usually find an adapter for a few bucks online or at places like wal mart. Sorry. Was just assuming you had one. Without it, yes youll have to try different drivers or find another way to get it going via one of the two methods I mentioned.
When trying different drivers, just installing the package doesn't always do the job. You should go into device manager and manually select update drivers, then browse to the folder in Program Files and choose it there.
When you plug in now, does it at least detect it? Are you trying while in Download Mode?
What version of TWRP are you using? You could try flashing CWM or Philz recoveries and try the rom again. If you still get flashing errors you may have to find a way to get Odin to work.
Try uninstalling drivers from device manager. Then with the phone unplugged, reinstall the driver package. Plug phone back in and hopefully itll automatically install the drivers and work.
And have you tried connecting while booted to Download Mode?
You might need an updated recovery to flash that rom. Latest TWRP is 188.8.131.52.
But since you can connect in Download Mode you can flash your firmware via Odin...hopefully.
If you have the I747, it depends on if you have ever updated via ota. If so, do you remember if you had updated to 4.3 or 4.4.2?