At magic numbers such as 32GB and 64GB, each require more coding for such players to use the drive. You'll have to ask the player's maker if they have firmware to support this large drive.
Bob
I am trying to replace the original Entempo spirit 20 GB HD with a 80 GB HD
Unfortunately the Entempo does not recognize the new HD.
The new HD was formatted in FAT 32.
Partition of the HD into two drives also did not help.
Any ideas?

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic