yes the reason it's this..ntfs is a proprietary format by m$PS3 does not use NTFS for royalty reasons, it is owned by MS.
The 4GB limit is a limitation of the FAT32 standard - See here
SAK dumps BDs in pieces because there IS a limit.
Either mistaken or full of it.
It will not take files over 4GB. DRM does not have anything to do with it. DRM requires certificates, and only if the file is encrypted with a type of DRM. This would be ITunes, 'some' MS WMV encoded files, etc.