I have several folders 1-4 in the sounds/pusbck directory (see attached, marked in red). Are there of any use or is it ok to de;ete them?
Don't touch *anything* in the GSX folder, the reason why we have an updater, is precisely so every file is where it's supposed to be, and no extra files are there. If you touch anything, you'll risk malfunctions, which will be fixed only after you run an update CHECK again, which will restore the files you changed or removed.
In that case, those folders are supposed to be there, since they are extra variations for the US-English accent for the pushback, to offer more variety, instead of always the same voice.