
Ugh! Okay, I found that not all Mini SD cards are made equal. For starters, most 4GB Mini SD cards are SDHC format, which is not compatible with the MDA. I did purchase a 4GB standard format mini SD that works, but it so slow that I get read errors and lockups which means it is practically useless. I have read other posts that some people have found 4GB mini SD cards that work just fine with the MDA and others who have the problems that I am having. I am formatting the mini SD to Fat16 as I type (it was FAT32) to see if this helps, but I doubt it will. I was able to format the card using the PDA so that should be the best case scenario, but it is just too slow. I think these statements are correct.
-SDHC memory does not work in the T-Mobile MDA
-4GB mini SD will work if it is standard format SD
-Some 4GB mini SD cards are too slow to work properly with the MDA.
-Don't buy a 4GB mini SD unless you know it is standard format and it is fast memory.
Hope this helps. Please let us know if you find out differently.
Thanks,
JaMMy