Okay it looks like you have some files stored in your main memory....
Click Start
Click Programs
Tap Search
Click on the All data and select "Larger than 64 KB"
Tap Search
You will see a list of files that are larger than 64KB, now from all of these files that do show up you'll notice that some of the files have a little square with a smaller square inside. Those files are stored on the storage card, the ones that don't have that are stored in the main memory. In the far right column you'll see numbers which represent file sizes (i.e. 92.7 KB or 102.1 MB, etc...)
So now knowing these two things you should be able to track down files that are stored on your internal memory and move them to your storage card. Now when I say files I don't mean files that you don't recognize (because those could be application files) what I mean is you can move those files like SomeRandomSong.mp3 with a file size of 10.76 MB.
Now in the case that this doesn't remedy the problem then try re-installing the ROM on your device. Personally seeing that you're a Cingular customer I'd go with a custom ROM, perhaps one that has CF built into the ROM...
A Good Custom ROM for Cingular
Make sure you unlock your phone first...
check here
If the downloads are slow you can try getting it from my server...just do a search for custom Cingular ROM on my site it should show up...
My apologies for the lengthy post, I was just hoping I could resolve this issue for you in one post as opposed to going back and forth...
Hope it all works out for ya...
Cheers!