Crossword Genius

Young girl drinking cider’s formatting the storage media (5,5)

Ross

I believe the answer is:

laser discs

I'm a little stuck... Click here to teach me more about this clue!

'drinking cider's formatting the storage media' is the definition.
I don't know anything about this answer so I can't tell whether it can be defined by this definition.

'young girl' is the wordplay.
I cannot quite understand how this works, but
'girl' could be 'di' and 'di' is present in the answer.
This explanation may well be incorrect...

Can you help me to learn more?

I've seen this clue in The Hindu.
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