storing drawn comb

To a hobbyist I recommed to use a large plastic barrel. They are cheap, less than $15, and hold 10 Deep frames and 20 Medium frames at one time. By closing up the lid you keep out the wax moths, and other pests and you have easy access to frames as you need them, or as you need to apply more...

Is there anything wrong with placing a couple boxes of empty drawn comb above the inner cover on an active hive? In a spur-of-the-moment decision yesterday, I placed two medium boxes of frames above the inner cover of a hive. This is a small colony started from a late summer split in two...