On my Lumia 820 new files are deleted and other old deleted files are reappearing automatically, has anyone else had this issue?

[Windows Central Question]

in my lumia 820 new files are deleted and other old deleted files are reappearing automatically

i am using nokia lumia 820, from a week when i add some new music or image files to my sd card which is my default storage the files i added are automatically after some time and i i delete any files they are reappearing automatically. this creating a quite a problem to me.
can anyone please give me solution for the issue?