I just did a test on my new Kingston SDHC and my old Transcend SD X150 on Kodak MD853 HD: Results are: Kingston SDHC 4GB Class 4 rating (4MB/s) Free Space: ? Used Space: ? File system: ? Picture count: 3467 Audio/Video: 80:00 minutes Transcend SD 4GB X150 Free Space: 3.82GB Used Space: 96.0KB File system: RAW Picture count: 3533 Audio/Video: 80:00 minutes Between the two Picture count difference: 66 My Belkin Hi-Speed USB 2.0 reader/writer can't read the SDHC. Now I'll have to get one that does. The Kodak can read it okay..Transfers are quick so far compared to the X150 Transcend speed seems slower to me. I going to use the Transcend to store 1,740 WMA songs on SD 4GB on a 2GB I have 870 WMA songs. A fews years back Microsoft included a on XP Plus CD a Plus! MP3 Audio Converter. I used that on all the MP3 I had.