Max USB Flash Drive Size that Ford Sync will work with on 2015

[ZREXER]

After looking at the manual, I can't see anywhere where they advise the maximum USB drive size. I currently have a 32 GB that works fine, but my song library on my computer is up to around 7500 songs and at a WMA 192 bit rate, the 32 GB is too small. Would like to go to a 128 GB drive.
I did see a mention in the manual regarding a 6000 song maximum. I assume this it just if you wish to maintain the ability to use voice commands to select a song. I see others are past this limit, so I assume you can access via the touch screen or just leave it on random play
I see we have 2 USB drive slots, can you toggle between drives or does the system see both drives at the same time?

 

[CanadianGuy]

I know a few run large ssd instead of sd cards. I personally have a 64 gb on sync 2 with no issues.

 

[gongos]

I use a 256 gb with no problems. There is a limit to the number of tracks sync can recognize. It's around 14900 individual tracks I think. I have more than that so I broke it up between multiple flash drives.

 

[CanadianGuy]

I use a 256 gb with no problems. There is a limit to the number of tracks sync can recognize. It's around 14900 individual tracks I think. I have more than that so I broke it up between multiple flash drives.

Wasn't that the limit per folder or play list? I though I remembered reading something like that but I could be wrong and you have the real world experience. I'm more curious.