something is dodgy here , TYG02 discs are -R
Cornholio, I must admit that you were so right (admit even after a year )
Yesterday I bought a hundred Tayio Yuden, from the same shop, but slightly more expensive than the previous ones, which were yellow colored.
Now the new disks are white and I already succeded burning an img file with WOPC enabled (first try successful in full speed).
With the previous yellow TY disks, it was impossible to complete burning with WOPC enabled in full speed, only in 2X. When I was disabling the WOPC, the burning was successful at 8X. However now, with the new disks, I already got the same speeds with WOPC enabled.
I will try later on, to burn with the new disks and disable WOPC to see what speeds I can get.
I strongly recommend avoiding the previous problematic yellow TY disks. To give another example, I had a yellow TY disk containing 4.3GB video file, which I was trying to copy (for a friend) to a new disk (picture of the new disk is below) and I got a message that there is not enough space and that copy cannot proceed (with two different copying software).