That is actually a lot less than I expected. Since one can easily connect an external drive to add more capacity, then the limit should not really be an issue to most anyway.The 722 Claims 55 HD and 350 SD But my guess it slightly more
The 612 and 622 are Claimed 30 HD and 200 SD , But since everything went Mpeg 4 I've got 42 hours on my 612 and about 33 on my 622.
Plus I got a 750 GB External Hard drive that increased the capacity Massively. I'll never fill it. I know that much.