So I inserted my microsd 32 gig card. Settings see's it, but how do I access the card in the "My Files" app or in "File expert"? DOes the tab act in a way that it's combined space or something?
I use Astro file manager and Super Manager apps, both are free and will allow you to browse your SD. I haven't used the apps you mentioned, it could be just you are browsing in the wrong place. Try looking for ex-sd card, I don't have mine with me to check exactly, sorry. Your tab should have both sd card and ex sd card when you insert the external 32 gig.
When I received my tablet, it came with android 3.1 which allowed me to access the micro sdcard as usual. However, after I did the upgrade to android 3.2, it was all read only through all the file manager apps. So, I had to root my galaxy tablet and change a setting in a root file (found procedures over on XDA) to get it write access back on the micro sdcard. Google changed something in the source code apparently.