I have an HP Ipaq hw6915 and found the following on the HP web site - I am not "promoting" them in any way, and haven't used them ( yet ) but they appear to be worth a look, and can back up / restore your data to / from a memory card installed in your device if you have that facility.
( BTW what PDA is it ? - Might help others provide suggestions ? )
SPB Back Up :
SPB Backup Products SPB Software
Sprite Back Up :
Sprite Software - Full Edition
Let us know how you get on
