Document store (7)
I believe the answer is:
archive
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">document store</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for archive that I've seen before include "Stored data" , "Collection of records or papers of an organisation" , "Collection of public records etc" , "Collection of documents of an institution or community" , "Repository of historical records" .)