If the file is located in the NTFS file system, everything seems to be fine. However, if the file is located on FAT or FAT32 file system, file's content is getting erased and it becomes a 0KB file after File.Copy.
File.Copy(biggerFile, smallerFile, true);
The issue happens when there is no enough space on the "smallerFile"s drive and File.Copy operation fails with IOException.
Is this something that is expected, because I can't find this behavior documented anywhere?