After a few phone calls with Apple, trying to figure out why files over 2gb are giving me unexpected error Code -50, and transferring at 20 or more minutes, I finally figured out why I was having such a problem transferring files to my Airdisk.
You have to usa a HFS+ format, not FAT32. I finally moved to a GUID Partition with HFS+ (Journaled) format and it’s twice as fast when transferring files wirelessly.
So if you’re out there on Google like I was, looking for this, I hope you find this and do like I did.