guess I hit the wrong response button and didn't post yesterday. sorry if this is a duplicate
card was a 4 GB U SDHC class 4 by sandisk known good. Don't think the the speed is that critical due to the age of the TT one XL. Slot was for older SD card. Did try second U SD adapter as I have found bad ones.
Yes the program works both with the card in (new) and internal memory (old) I read on this forum (somewhere) that this is a trait with the XL and not all. Some loose the internal program
SD card slot and covering sticker was by the manufacturer and not a hack remodel. The sticker said something like "internal memory only"
I suspect the bad directions were due to routing algorithm or a settings preference problem. Had that happen on smartphone OSM navigator. A frontage road was preferred over the highway.
what I was able to do was update the memory type and size, core program, and map. What I got was a dedicated GPS display that may be slower processor but is better sunlight readable.