I've been using an old windows 10 boot able drive for a while now and I was like why not delete everything in there and just run the media creation process again so that I dont have to install updates everytime I install windows, but after I deleted all of the old files and the new ones are in there, half of them have a date of modification of the date that I ran the media creation tool which is today but half of the files show that they were modified like 4 months ago, is this normal?