i have a MBP and my ext. HDD(raid0) supports both FW800 and eSATA i use the HDD as scratch disk and rendering output. the figures show that eSATA is faster than FW800 But, when I tried to copy a 2Gb file to the HDD, I found that FW800 is slightly faster than eSATA through ExpressCard. So, what should I use? Thanks.