AirportExtreme + external Hard-Drive / SMB - Fat32 / Buffering

Hello,

I have an external USB-Drive (Seagate 1TB) connected to my AirportExtreme.

The Harddrive is in FAT32 and if I play a 720p mkv (3GB) file the ATV is buffering every 3-5 minutes.

 

If I format the hardrive in hfs+ and connect it via AFP to the ATV the file plays fine.

 

But I need the external hardrive in fat32 because my NAS can´t read or write hfs+

Hope somebody can help me…

 

Regards