XDJ-XZ USB Sporadic Error E-8307

Just received my XDJ-XZ running firmware 1.0

I have a 128gb Sandisk Extreme Pro that I normally use for club gigs (HFS+ and about half full). It works normally on NXS1 and NXS2 units.

For some reason when it's plugged into my XDJ-XZ about 70% of the time I get a 8307 error. I hit USB stop, eject the unit and try again and eventually it loads all my songs.

Never had an issue with CDJs.

As you know, this is a high quality SSD thumbdrive that is used by many touring DJs and is on the 'approved' list that pulse put out previously. I checked the disk utility on my mac and have uploaded the diagnostic information below. 

First aid returns a normal drive:

Here is the disk information:

Lastly the error screen on the unit:

I've tried using both USB ports on the XDJ with no increase in success rate.  Interestingly, I noticed on my drive that there is only a contents/ folder, not a pioneer/ folder.  On my other (older) Sandisk Extreme Pro drives there is both contents/ and pioneer/, but those are FAT32 drives.

Any suggestions? In the interm, I'm formatting it as FAT32 to see if that makes a difference and retrying on my unit.