I want to mount a local point to my windows NAS. I know how, here's the

mount -t smbfs -o username=admin,password=pass //nas_adress/my_share /mnt/nas

This command works, I can make local images to this mount point and images
going through my NAS but only with small images of about 2Go. I know that
smbfs have limit of space, but how can I extend this limit or can I use a
different FAT type with no limit of space? and this Fat must be compatible
with my Windows NAS...

I tried the -t ntfs, but doesn't work and it seems that other parameters
must be setted.