http://www.microsoft.com/resources/d...c_fil_tdrn.asp
FAT16 Size Limits
Description Limit
Maximum file size 4 GB minus 1 byte (232 bytes minus 1 byte)
Maximum volume size 4 GB
Files per volume Approximately 65,536 (216 files)
Maximum number of files and folders within the root folder 512 (Long file names can reduce the number of available files and folders in the root folder.)