Contents of data, stick found in storage area (5)
I believe the answer is:
attic
'storage area' is the definition.
(an attic may be used as storage space)
'contents of data stick' is the wordplay.
'contents of' indicates the central letters (I've seen 'content of' mean this).
'stick' becomes 'tic' (I can't justify this - if you can you should believe this answer much more).
The middle letters of 'data' are 'at'.
'at'+'tic'='ATTIC'
'found in' acts as a link.
(Other definitions for attic that I've seen before include "Room at the top of a house" , "28 [GREEK]" , "Upper chamber" , "Classical" , "Dusty room" .)