Did this experiment and it works but with caveats:
1. The disks bigger than 50GB require a BDXL drive to read, which means spending $300 on a disk player. Which also means rare to find in the future. So if you want larger compatibility use 50GB or smaller M-disk.
2. Japan sells supposedly original MDisk but they look rather black than gold, so they are not the original. Still strength and longevity is quite good on Blu-ray.
3. Storing the disk on materials that degrade like cloth/plastic sleeves may be counterproductive. I got a hard case but it takes effort and is increasingly hard to find.
1. The disks bigger than 50GB require a BDXL drive to read, which means spending $300 on a disk player. Which also means rare to find in the future. So if you want larger compatibility use 50GB or smaller M-disk.
2. Japan sells supposedly original MDisk but they look rather black than gold, so they are not the original. Still strength and longevity is quite good on Blu-ray.
3. Storing the disk on materials that degrade like cloth/plastic sleeves may be counterproductive. I got a hard case but it takes effort and is increasingly hard to find.
Still the 50GB play nicely even on old players.