TEAMGROUP A2 Pro Plus Card 1TB Micro SDXC UHS-I U3 A2 V30, R/W up to 160/110 MB/s for Nintendo-Switch, Steam Deck, Gaming Devices, Tablets, Smartphones, 4K Shooting, with Adapter TPPMSDX1TIA2V3003

This 1TB Teamgroup microsd card tested at an even better than rated at nearly 160MB/s read/160MB/s write - but ONLY with one of Sandisk UHS-I microsd readers that supported their proprietary "quickflow" tech. Summarizing from the tech summary Western Digital published for it - it requires a compatible controller on the card and then can run it at higher clocks and data rates than UHS-I should officially support. Their whitepaper shows this can allow for up to 200/140 when the UHS-I bus technically can't do anything past 104MB/s. (UHS-II cards can do just over 300MB/s read and write, for comparison). This also doesn't just work for any card - I tested some other cards I had laying around and none of them got speed boosts out of the quickflow reader except for the TeamGroup cards and the Sandisk Extremes.If you see ANY UHS-I/V30 microsd card adverising at >100MB/s, it's likely using this tech to do it. That's the hard limit on the bus interface without workarounds.My theory is that either Teamgroup is buying and selling the lower binned sandisk extreme 1TB cards (which can do 190/130 with quickflow readers only). There aren't many true manufacturers of flash memory and controllers and I have no idea if Teamgroup even makes their own memory as their site doesn't says. I wouldn't be surprised if they were just a relabel of lower cost name brand castoffs as that's not uncommon in electonics.Why am I pretty sure of this? Well I tested with three other readers - a USB 3.0 UHS-I reader without quickflow, a USB 3.0 UHS-II reader without quickflow (to rule out that this is a UHS-II card sold as I), and a built in UHS-I reader in my laptop just to rule out the usb connection. All three got pretty consistent 98-100Mbps read and write which shows a few things - they hit the max bus speed for UHS-I, aren't actually UHS-II sold as a slower tier, and that the only explanation left is that they're at the very least using controllers with support for quickflow.It's interesting that Teamgroup doesn't mention this anywhere as it's the only way to get the max rated speed . Even their website just states a vague note that they can surpass the 104MB/s bus limit on UHS-I - and as far as I know all the other results in reviews here showing 90-100 read and write are the best you can hope for with a bog standard reader. Considering they also frequently sell for 2/3 the cost of the sandisk extremes and are often the cheapest 1TB card on the market I'm pretty pleased.I've been buying these in different capacities for raspberry pi projects for a year or two and had no issues with them. An important note though is that as noted you need a quickflow compatible reader in your PC (they're pretty inexpensive), but also support on the end device which is pretty rare, if it exists in anything. For me the faster speeds to fill up the card before transferring it to the Pi is the main reason it matters. It takes a long time to transfer 1TB of data at 60-80MB/s. It is however amusing that this tech even exists when UHS-II may only require extra pins and traces on the card in some cases.

Team group has been around for some time now. They have proven themselves to be reliable.Great compatability. Easy to install. Format is fast.Great value for the money.I have had these cards for years and the 1st ones I got are still working.The speed is amazing. I just started backing these cards up from my security cameras on my pc. Now you don't really need these speeds for security cameras, but its about how fast they back up to other media. Sitting there for 6 hours or less than a hour. That is why you want these cards.If you are going to use them for video or even high mp cameras for stills these are a must have. That is if you have a camera that uses microsd.

I had bought real inexpensive 1 TB micro SD cards and Got What I Paid For!. Did not lose a whole lot of money on them; they were worthless pieces of junk and inuseable. So be warned!Saw this card and diligently went through all the reviews and then others I came across on the web. I cannot comment on the phtographic aspect since my purposes were for Documents only. Whereas the inexpensive card would not complete the f ile/document transfer of 54GB; this TeamGroup SD card finished quickly within 45minutes!Checking over the transfered files/documents, there were no errors. I highly recommend this card for your file/document transfers; though, again, I cannot comment on the photographic usage of this card. More times than not, U truly get what U pay for; and in this case the higher - though affordable- price was worth the effort and time.

Fast and durable If you own a steam deck or Legion go I suggest go with this card the other cards I tried from other brands could not handle the trades and writes you will execute when owning a steamdeck or Legion go or ROG Ally ( I have two one installed on my deck the other installed on my Go

Only getting low 40's transferring (writing) 400gb+ of switch games from a samsung nvme on a superfast pc setup with a dedicated micro sd slot. Expect it to take some time. Was hoping for better, but all in all it's a decent price considering other card options.

These 256gb Micro SD cards from teamgroup test to be exactly what they claim. They are full size and no errors in the ones I tested. Looks to be a good solid option for micro SD cards.

Pretty slow at only 20 MB/sec write and 15 MB/sec read, but all the space appears to be there and I didn't buy it for a speed application