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That little SD card - or Secure Digital card if you want to use its full name - has provided us with the de facto means of portable storage for a very long time. In that time, it's fought off plenty of competition, but still sets the standard when it comes to expandable storage.Nowadays, you'll find SD cards come in all manner of different shapes and sizes, and can be slotted into plenty of devices from cameras, smartphones and handheld games consoles like Nintendo's Switch.
The next area of confusion is around speed classes.
The latter stands for ‘Secure Digital e Xtra Capacity’, which go far beyond 32GB in size.
You can buy SDXC cards with a whopping 2TB of storage.
The mini SD card never gained much traction, however, so devices that use it are relatively uncommon.
Often, mini SD cards will come with an adaptor that can convert it into a full-size SD card, which makes it easier to use with laptop card readers. You might have also seen it referred to as Trans Flash or abbreviated as a TF card.
High-resolution and high bit rate video requires a lot of data to be written to the card very quickly.
stills cameras with high resolutions and fast burst shooting will also take modern cards to their limits.
An SDHC-compatible device can use SDHC and SD cards, but will not be able to use SDXC cards.
The Mini SD was the first miniaturisation of the SD card and is around half the height of the original SD card.
SD, SDHC and SDXC all physically look the same, therefore they’ll all fit in a regular SD card slot.
Problems might arise depending on the device you’re looking to use them in.
Older devices that pre-date SDXC’s introduction might therefore not be compatible, so be sure to check your product’s specifications.