Unit of computer storage (4)
I believe the answer is:
byte
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">unit of computer storage</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 byte that I've seen before include "quantity of memory" , "Unit of (usually eight) bits" , "Very little info" , "Computing unit" , "Computer memory unit of eight bits" .)