Originally Posted by Miriyo:
“Since I've currently got two episodes of FlashForward on my 4GB USB stick at the moment, I thought I'd share the file sizes:
1 episode with recording padding set to 2 minutes before and 5 minutes after programme is 1.834GB and another episode with padding set to "Auto" is 1.636GB. Both copied onto this stick no problem.”
The first is a 67 min file, and the second should be a 60min file.
If my maths is correct

that gives a bitrate of approx 3813 Kbits/sec, which looks about right for Fiver according to Linowsat.
If you had recorded an hour from ITV West Country at an average from the last 10 days of approx 6800 Kbits/sec, you would get a file of 2.92GB, quite a difference.
Rgds.
Les.