SD Card - UHS Class 3 supported?

[Vrobenmat]

Hi - I got a Toshiba exceria 128gb micro sd card. Didn't really look when ordered, but turns out this is a UHS class 3 card - apparently the fastest class currently produced in terms of minimum read/write speads.

My phone recognises the card, asks for external/internal use - then says it 'too slow' irrespective of external or internal formatting.

If formatted as internal, the phone then get stuck in a bootloop when shutdown or rebooted - it will constantly go to fastboot/recovery. Occasionally, after going to fastboot 4-5 times it will reboot normally to system.

The only way to get it boot consistently is to pop out the sd card, then pop it back in once the phone is booted up and asks for the missing card. Then it runs fine - although I feel apps installed to the sd card run slowly.

Needless to say, this a PITA - my current solution is just to leave the phone on and put it in airplane mode overnight.

I can find mentions of similar issues on the other G5 series phones, and even the G4 - all those threads seem to indicate the these phones will only handle cards up to UHS class 1 correctly.

Before forking out for a UHS class 1 card, is anyone else experiencing this issue?

Cheers!

PS - Note the phone is stock with the october 1st patch level. I've tried wiping cache and/or doing a full factory reset via stock recovery, but the issue always comes back.

 

[CatsAreGods]

I got a super fast card like that (it was a Samsung 64GB though....from what I could tell by Amazon reviews, they make the most reliable fast flash memory), also formatted it as internal, and have had exactly zero issues in a month of heavy usage. So I'd say it's your card.

P.S. Are you in India or something? Because I have yet to see a single update past June.

 

[cutterline]

No problem with mine, Samsung Evo Plus 128GB. Well, it says UHS1 card on the cardboard but have u3 logo on the card. I suspect it is the same with exceria
It also gave me notification that it is slow. Seriously, something is wrong with motorola, the speed is slower compared using it on PC.

Just an advice, don't use it as internal. There is no real advantage of internal except installing app on sd. It is a time bomb because it isn't robust enough to handle read/write for a long time. When the time comes, it becomes corrupted and you pretty much have to deal with what you had through and probably lose most of your data as well.
Do you know why Google never put sdcard support in their devices since nexus era? IMHO, that is one of the reason. It isn't as reliable and as fast compared to the one they use as internal storage. Well, of course nowadays, they are doing it mostly for gaining money by people using cloud storage.