NUTBYY Micro SD Card 400GB High Speed Class 10 Micro SD SDXC Card with Adapter

Excellent memory capacity but it runs slow

It worked for my android phone.

Works perfectly in my Samsung Galaxy S4 Tab. It's not unusual for formatted capacity to be less than "advertised" because the file system itself needs some space. 390 GB is fine by me. I have a 128 GB card that shows a capacity of 120 GB. Also be sure your device supports the size card you have.UPDATE: After a little more than a year of use, I noticed that once the usage went over about 30 GB, anything else copied to the card disappeared in minutes. I was fortunate to be able to back up everything on the card, and then I replaced it with a name brand card of the same capacity. No problems since then.

I’ve seen tons of reviews about fake memory cards, apparently this is one. You can put the device in your machine and it will say there is 390 GB of formattable storage, regardless of which tool you use to format it it will not hold the full capacity. I’m using this for a raspberry pi project and when I attempted to expand the file system to the full capacity of the card the system basically freaked out and said the storage clusters were not real. I’ve spent a lot of hours trying to make this card work, but it is not reliable nor does it work as advertised

Bought this card for my nintendo switch, kept running into errors with games failing to download at a certain percent. Found out this can be caused by fake memory cards claiming to hold more space than they have. With testing I came to find this holds about 12GB, maybe less. DO NOT BUY.

Garbage. Does not hold nearly the capacity advertised.