800M for 30mins seems okay. Going on roughly 1GB per 30m this still gives 2 hours within the 4GB FAT32 limit, which should, in general, cover most requirements, so I am happy with that. Thanks for doing the test.
One very last question if I may ... having got the '.ts' file on the PVR-HDD, when I copy it to the USB-HDD does it auto-convert to a (different) readable codec so that the laptop media player can read it, or, is '.ts' a generic (dare I say 'standard') format that (?most/all?) media players can read anyway ??