As of February 2022, the largest capacity MicroSDXC card you can buy is a 1TB model. The SanDisk Extreme card is also the fastest and most reliable 1TB model available, compared to other brands like PNY and Lexar, which have slower speeds. The Extreme is also faster than the older grey SanDisk Ultra cards too. I bought this card myself for my Nintendo Switch, because it's easier to purchase games digitally instead of having to insert a different cartridge every time you want to switch to another game. So far, this Extreme card has worked perfectly. Games load very quickly (15 seconds maximum) and I haven't had any issues as of yet. For a 1TB card, you actually get about 953GB of usable storage (the rest is used for formatting). If you're buying this card, I do ... MoreAs of February 2022, the largest capacity MicroSDXC card you can buy is a 1TB model. The SanDisk Extreme card is also the fastest and most reliable 1TB model available, compared to other brands like PNY and Lexar, which have slower speeds. The Extreme is also faster than the older grey SanDisk Ultra cards too. I bought this card myself for my Nintendo Switch, because it's easier to purchase games digitally instead of having to insert a different cartridge every time you want to switch to another game. So far, this Extreme card has worked perfectly. Games load very quickly (15 seconds maximum) and I haven't had any issues as of yet. For a 1TB card, you actually get about 953GB of usable storage (the rest is used for formatting). If you're buying this card, I do recommend to keep it in your device permanently, until you actually go to replace it with a larger capacity card. Remember, MicroSDXC cards are extremely small and fragile (about the size of a finger nail), so it's very easy to misplace them and lose them, or even damage them.

I recently purchased the SanDisk Extreme 1GB SD card, and I have to say I'm very disappointed with its performance. While the packaging boasts up to 190 MB/s read and 130 MB/s write speeds, the actual results I got were nowhere near that.After running a few tests, the best read speed I could achieve was only 79.58MB/s, which is less than half of what was advertised. The write speed was slightly better at 83.65MB/s, but still nowhere near the claimed speed.For a card that's supposed to be "extreme," I expected much better performance. The slow speeds make it difficult to transfer large files quickly, and it's most definitely not suitable for use in your Steam Deck, high-performance cameras, or other devices.

Card was recognized as 1TB but no data could be written to it, nor would it format in Windows, Mac or any of my devices.Windows would give an error indicating the card could not be formatted. Trying the SD Formatter utility, the Format would seem to succeed, but If I tried to write a file to it later, the file would seem to be written - however if I ejected and then re-inserted the card, the file would not be there. Eventually, an error would be shown.MacOS would actually hang during the formatting process, requiring a reboot.My Steam Deck would get stuck on rescuing followed by an error. Trying the KDE Partition Manager in desktop mode, I would get errors as well saying the device was busy.My Switch simply indicated that the card could not be used.I have ... MoreCard was recognized as 1TB but no data could be written to it, nor would it format in Windows, Mac or any of my devices.Windows would give an error indicating the card could not be formatted. Trying the SD Formatter utility, the Format would seem to succeed, but If I tried to write a file to it later, the file would seem to be written - however if I ejected and then re-inserted the card, the file would not be there. Eventually, an error would be shown.MacOS would actually hang during the formatting process, requiring a reboot.My Steam Deck would get stuck on rescuing followed by an error. Trying the KDE Partition Manager in desktop mode, I would get errors as well saying the device was busy.My Switch simply indicated that the card could not be used.I have another SanDisk card that had no issues.SanDisk needs to actually test their cards before shipping them out, especially for expensive 1TB cards.