Computer storage unit (4)
I believe the answer is:
byte
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">computer storage unit</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 "Computing unit" , "Unit of memory storage in computer" , "Very little info" , "Set of eight bits" , "Computer space storage unit" .)