That is correct, you HAVE to burn them to a CD with maximum file size of 1.5mb.
Sync Nav system uploading pictures - YouTube
If you have access to a mac, the file system it uses to burn CDs is what the system needs. On PCs, its a bit more involved. Never got around to finding out how to do it on a PC because I haven't ever burned a CD on my desktop, I always use my MacBook...
So it wants FAT32 vs NTFS?