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Next-gen optical disk can store over 14,000 4k movies
(www.digitaltrends.com)
This is a most excellent place for technology news and articles.
Mildly infuriating photo of the disc being inserted upside down.
Double sided disks look like this
Which this probably is if they want to pack as much data as possible in one unit.
You seem like you've handled quite a few double-sided disks in your day.