Items given for storage in a bank (4)
I believe the answer is:
data
'items' is the definition.
(I have seen 'Items of information ' mean 'data' so perhaps 'items' could also mean 'data')
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for data that I've seen before include "intelligence" , "Facts and figures as fed to computers (4)" , "Facts given" , "Factual information" , "Collection of facts, information" .)