Museum of Obsolete Media on Twitter: "The mini DVD-R was an 8 cm version of the DVD-R that was primarily aimed at the camcorder market from around 2003 to the early 2010s.
Amazon.com: Sony 8cm DVD-R with Hangtab 5 Pack - 5DMR30R1H : Electronics
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Mini Dvd Discs : Target
Converting Mini DVD To Digital - Convert DVD File to Any Format | Tape Transfer Mini DVD to DVD or Digital File in Oxfordshire UK