I can't remember the name of the site but there is an SDHC loader available for the Palm TX. Once I look it up I will post the information here. As far as I know this loader works with cards up to 32 gig in size, I have tried it with my 16 gig card and had no problems. The program sells for $21.00 US but has a 9 day trial. There is also lots of other good utilities there to be had.