Probably dust particles and slight rotation while in the backpack.
Oh this takes me back
Likely a slightly warped CD case with a grippy bit in the middle that’s undersized. Which means the discs can rotate and then collide with the case. But key to the scratches is the undersized grippy thing, a good case won’t let your discs spin.
Cheap cases have been doing that since I was a kid and I burned my first CDs back in the day. Nothing quite like being the cool kid with a CD burner back in the day.
God I’m getting old.
Friend, that’s a way too much perfectly circular scratching to be blaming it on rotation from shaking the case in a backpack imho. I’d be more inclined to think the damage happens in the player.
This wear pattern is formed by spinning while some rough object touches the disk. Are you spinning them a lot in the cases with your fingers - absentmindedly? If not, it’s for sure the player.
Nope, but they may spin while in the backpack. Additionally they may also get pressed slightly. The scratches also develop on the cases themselves.
Are you sure it’s the case and not the dvd player? My old PS2 would scratch the disks with its lens and made circular scratches similar to this.
