you must have been one of the fortunite few that got an xbox with a 10 gig HD. Most xbox comes with an 8 gig HD, and all 8 are used by the xbox. That is why though that I ahve it set up to use E: for everything on a stock HD, not all stock HD's have that extra 2 gig to use, so to play it safe, I took the route I did.
as for playing xbl, as long as what the other senior members states is true, by uninstalling to play on live, and then using the re-install option *should* be completely safe. again, I am not going to make any garintees on this, because in theory your C: is back to 100% stock, so you should be safe, but some sellect few still seem to beleave that they scan your HD and if you have anything questionable installed (like an apps or games folder in E:), then you get banned.
Like it is stated in the readme, once you use an exploit on an xbox, you are taking the possable chance of being banned and assuming the risk of it. the only real true way to not be banned is to use a 100% vergin xbox.