I believe there may be a menu setting which asks which length of tape you are trying to use. IF it is set on 30 minutes...it may only record 30 minutes on a 45 min tape. Check your menu setting and your operational manual. AS for longer tapes --- Go to JVC.com and utilize the "accessory store" to research tape types and lengths. If there is one available for 60 minutes--it should be listed

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