I used a 32GB PNY microSD card and it works great. I moved all my music files to a Samsung 64GB microSD card and the unit says "unrecognized card" or something like that....

32 gb is largest sd card in all nex. has to be sdhc, the larger ones are sdxc or something like that. different controller and format. 

I just put my favorite 3800 songs on sd card, If you want your whole library, then probably want to go ssd in usb inclosure. 

If you format 64GB to NTFS which is easy in Windows 8, or to FAT32 using 3rd party tool, then you should be OK.

I'm guessing there is NO maximum size limit really to the NEX unit if you're using NTFS.

No!

64Gb+ cards are SD/XC and those cards require exFAT due to how their internal block allocation system works.

If you reformat them to either FAT32 or NTFS you are begging for them to lose your data.  They become unstable due to interaction between the data management algorithm in the controller (internal to the card) and the filesystem format.  All these cards essentially require exFAT as a format to remain stable over time.

The adoption of a proprietary, license-required format (exFAT is a Microsoft product and manufacturers have to buy a license to use it in their products) for these cards sucks, but it is what it is.

So I put my 32GB back with exFAT formatting and it gave the same error. Then I re-formatted the 32GB with FAT32 and now it works great.

No!

 

64Gb+ cards are SD/XC and those cards require exFAT due to how their internal block allocation system works.

 

If you reformat them to either FAT32 or NTFS you are begging for them to lose your data.  They become unstable due to interaction between the data management algorithm in the controller (internal to the card) and the filesystem format.  All these cards essentially require exFAT as a format to remain stable over time.

 

The adoption of a proprietary, license-required format (exFAT is a Microsoft product and manufacturers have to buy a license to use it in their products) for these cards sucks, but it is what it is.

Is there any substantial proof that reformatting a SDXC will make its data unstable? I know that  NTFS has extra journaling feature that require more read/write, which might add a tiny bit more to the flash wearing. But from what I read so far I don't have anywhere mentioning that the difference is big.

I'm using a 64GB SDXC reformatted to NTFS in my AVIC-6000NEX, and the performance is pretty good. I don't know how long will it last honestly. But I'd probably stick with NTFS for now and happily enjoy its larger capacity over 32GB until I see some scientific figure or theory persuade me otherwise.

Is there any substantial proof that reformatting a SDXC will make its data unstable? ...

IDK about substantial proof, but there's enough web content on the issue to surmise it's a real possibility.  From what I've read on the matter, the suspected common cause is ejecting or de-energizing prior to suspending data operations.

There are claims that an instability could render the card permanently useless.  If a reformatted card works, I say use it... just now that you are aware of the possibility, don't be surprised if it happens.

Don't have to believe me if you don't want to; I've looked into the controller logic on these cards in some detail.

Just don't put anything on the card you don't want to lose without warning.

Good discussion here. I'm glad I can always learn something every time here.

Never reformat a sdxc card with anything other than fat-ex or it will corrupt the card. 

BTW the reason for my somewhat-flippant response is that I've already explained, in pretty-meticulous detail, exactly why this is a bad idea several times on this forum yet people don't read before they post -- or worse, think that somehow the answer will change the more times you ask the same question.....

BTW the reason for my somewhat-flippant response is that I've already explained, in pretty-meticulous detail, exactly why this is a bad idea several times on this forum yet people don't read before they post -- or worse, think that somehow the answer will change the more times you ask the same question.....

It would be more helpful IMO if you could just provide a link to your other post explaining those issues.  Saves having to re-type and reduces other stress factors.    JMO

A simple search would answer a lot of these same questions.  I've found a good amount of info on questions I had searching.

Search is your friend

Search is your friend

But sometimes not.

But sometimes not.

It's always your friend, like a true friend it tells you the truth, good, bad, whatever.

It's always your friend, like a true friend it tells you the truth, good, bad, whatever.

Perhaps... but it cannot read your mind like a true friend

I've got the 128gb sandisk microsd, with about 80 gigs of flac files running in mine, and so far no problems.  I've used this same card in a cowon z2, and I just popped it out and stuck it in the pioneer and it's working fine for about a week now.  Still a little early to tell, but I'll report back if I have any issues. 

Could be that if you format the large sdxc, copy your files one time, then leave it alone. Just read from it from then on. Looks like when you continually write and delete files, the problem of corrupt files begin. Just a thought.