From the little you say it looks as if there is a 10 minute recording on there and then the disk has been closed.
I think there may be some form of software out there that will 'unclose' a burned disk- certainly some PVRS can do this.
Huawei P10 review
1995-2015: How technology has changed the world in 20 years
An overview: What leading creative agencies are doing to improve diversity
New iPad, iPhone SE & Red iPhone 7 on sale now
Synology invites you to visit them at Insomnia on 26th – 29th August. Book your tickets now and visit Synology.