The categories of SD flash memory cards for recording video. The three class types are Speed, UHS Speed and Video Speed. Devices that support any of the UHS buses also support the earlier Default ...

One of the biggest risks when buying memory cards is counterfeits. Fake cards are rampant on marketplaces like Amazon or eBay, often sold at too-good-to-be-true prices. They may look identical to the ...

This means you could sell a 2GB card as a 4GB card – your computer wouldn’t notice a difference until it started filling up that fake space. You can, incidentally, check your cards with this tool.