Problem while converting file system

Hello people,
I tried converting file systems. I ended up completely messed up.
For Windows 98SE and earlier, FAT32 or FAT16 is the type of file to the hard disk. NTFS is the standard for windows XP.
They say that NTFS is faster than FAT32, which is far superior. Especially when defragmenting, FAT32 is more slowly. I've tried to convert as well.
Now I don't even know what happened, I've gone wrong.
Please help.
Thank you.
