I had a TRG-PRO which was a classic Palm Pilot, but with a CF card slot in the back and built-in software to use the additional storage. I suppose it could hav

I had a TRG-PRO which was a classic Palm Pilot, but with a CF card slot in the back and built-in software to use the additional storage. I suppose it could have used a SD card if you adapted it with one of these: https://www.amazon.com/Compact-Memory-Adapter-High-Speed-Extreme/dp/B06XD8ZP1P https://www.amazon.com/Compact-Memory-Adapter-High-Speed-Ext... http://www.pencomputing.com/palm/Reviews/trgpro.html http://www.pencomputing.com/palm/Reviews/trgpro.html