/Library/Preferences and /Users/<username>/Library/Preferences

> /Users/<username>/Library/Preferences (or ~/Library/Preferences)

This is where preferences are stored for each individual user account, that apply to that individual account only

> /Library/Preferences

Here are preferences stored, that apply to all user accounts

Please let us know if you need more clarification on this!

actually i want to put a script that will run when every user logs in .
and it will delete .ds_store and disable it for network.
please help, how is it the best way to achive