Static template data members storage

Question

First I\'ll write example to properly address the question.

First of all, I\'ll declare template to be used to create singleton object (not auto-created): singlet

Answer 1

Though I may misunderstand your question, if storage in your question means definition, my answer might apply.
As for one definition rule, 3.2 p5 of the standard says:

There can be more than one definition of ... static data member of a class template ... in a program provided that each definition appears in a different translation unit,

and

If the definitions of D satisfy all these requirements, then the program shall behave as if there were a single definition of D.

There are some requirements for this rule. In this question's case, since the variable is initialized by an integral constant 0, the requirements are satisfied.