Why I cant move anything with the 'My Files' app?

[skymx]

I have a problem with moving some files to another folder at the "My Files" app (THIS IS NOT A SD CARD ISSUE). I'm using Samsung Galaxy Ace NXT (SM-313H) with 512 mb ram and 4 gb internal with 800mb free space , android 4.4.2 (KitKat). I did try es file manager but it says "Task Failed".help anyone?

 

[ManiacJoe]

What file are you trying to move?
From where?
To where?

 

[B. Diddy]

Welcome to Android Central! If the directory you're trying to access is a protected system directory, you won't be able to do it unless the phone is rooted.