Thanks for the explanation.
But still very strange to see the files, whether there is any solution?
I understand for what they are and they aren't necessary to me.
Those are hidden files, by default, so you shouldn't be seeing them.
To show hidden files in Finder, copy and paste the following command into a Terminal window, then press enter:
defaults write com.apple.finder AppleShowAllFiles TRUE && killall Finder
To hide hidden files in Finder, copy and paste the following command into a Terminal window, then press enter:
defaults write com.apple.finder AppleShowAllFiles FALSE && killall Finder