Make sure your MS-PD is formatted as FAT16, not FAT32.
The Clies only support FAT16 formatted volumes, of course there is a way around that, but it requires you to install a customised (hacked) driver, but that is another story.
If you have problems with your memory stick in 80% of all cases the controller of your stick is damaged and no software or card reader can help. You must separate the memory chip and dump the raw data to recover your data, look here: PRO DUO memory stick photo recovery
If you have problems with your memory stick in 80% of all cases the controller of your stick is damaged and no software or card reader can help. You must separate the memory chip and dump the raw data to recover your data, look here: PRO DUO memory stick photo recovery
That service is located in Germany.
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Th-55 U, T/X, TG-50, Handspring Deluxe (3) and PSP user.