Setting a path to a bibliography file in windows

Creating a new bib file to save it in the same folder as my tex file is a mess, therefore I would like to have a permanent general bib file and be able to set a path to it when I am making a new tex file. (I am working with Windows 10).

I have tried:

1. Use something like bibliography{"C:/Program Files/MiKTeX 2.9/bibtex/bib/FullBib.bib"} (and without the .bib) but there is a problem with spaces (I would prefer to put the bib file in another folder, something like blabla/documents/math texts/FullBib.bib).
2. Use something like bibliography{../../FullBib.bib"}.
3. Add as a root in Miktex C:/Program Files/MiKTeX 2.9/bibtex/bib/, refresh FNDB and try to use bibliography{FullBib.bib} but I get an error in the aux file in the line bibdata{FullBib.bib} and neither trying (1) works.

Point 1 was trying to follow How to have access to (or manage) bib files in MiKTeX?

Can you explain like I was a toddler how to set a unique bib file and use it forever after? Also, I believe I am using Bibtex but I am not sure.

I am working with windows 10, Jabref 5.2, Texniccenter 2.02 and Miktex 2.9. My MnotWE is

documentclass[a4paper,11pt]{amsart}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
usepackage{amsmath,amsthm,amsfonts}
%More packages
begin{document}

cite{something}


bibliographystyle{plain}
bibliography{FullBib.bib}%or bibliography{FullBib} or bibliography{"C:/Program Files/MiKTeX 2.9/bibtex/bib/FullBib.bib"} etc.

end{document}