Recently I was trying to recover a 32GB microsdhc card that had two partitions, one of which was inaccessible. One of the best tips I found was to try the sdfv2000.exe formatting program as it seems to be much more capable than the internal Windows formatting tools.
However, I had a heck of a time finding the sdfv2000.exe program anywhere. Thankfully I finally found it and here is permanent mirror where you can download it too:
local mirror dl
Best regards,
-JD
Rating 4/5 stars, it worked perfectly but was a bit tricky to configure!
sdfv2000.exe SD Card Format download,
verygood
Thank you for your comment Rakib