You can do that, personally I don't think it's necessary. Typically you make a backup before you wipe and flash a new ROM in case you don't like the ROM or something doesn't work right. Making one after the flash is a little redundant, IMO.The only reason I want to delete it is because on the stock ROM I had a few apps so it's quite a big back up, I want to restore my phone to factory defaults make a back up (small one I'm guessing) then flash a ROM and start loading apps etc is that right thinking or am I lost lol?
I am using es explorer and on there I didn't see SD/internal. My back up I saved with twrp is in SD/twrp. This is all new to me because my other phone had an SD card so when I did a wipe or something, none of my music or pics were deleted because they were on the card. There is no card here sorry for stupid questions.
That's the directory, you're just confusing the terminology. It's the sdcard directory, nevermind the slashes I used earlier, was just naming different terms for it