That makes a one-size-fits-all SD card approach a mistake. For indoor cameras with motion-triggered recording, 32GB might cover a week or more.

Modern MicroSD cards can have a capacity for a whopping 2 TB. Understanding the limits of this remarkably petite memory card format can be essential for photographers, gamers, and those with large ...

The best SD card for one device may be overkill for the next, or even incompatible. For most devices using standard-size SD cards, the SanDisk Extreme Pro SDHC UHS-I is our pick.

Run the Test: Launch AJA System Test and select the SD card. Choose the file size to write to the card and start the test. The larger the file size, the longer the test will take.

In 2000, card speeds were around 12.5MB per second. Modern cards using the SD Express standard can reach nearly 4GB per second, a speed improvement of more than 300 times.

SD Capacity Tops Out At 2 TB As of this writing, the highest capacity microSD cards on the consumer market top out at 2 TB of storage. On one hand, that's a lot of storage.

The formula used to calculate SD card capacity in version 1.01 of the standard. The 1.01 standard made a seemingly minor change – allowing the block size to be 512, 1024, or even 2048 bytes per ...

Divide the capacity by 0.93 to calculate the actual storage. Round this number up or down to the closest integer. If this number matches the advertised capacity, the SD card is formatted correctly.

The 128GB memory card is priced at US$699.99, and will be available in the first quarter of 2011, the company said in a statement. The 64GB card is priced at $399.99.

The 128GB memory card is priced at US$699.99, and will be available in the first quarter of 2011, the company said in a statement. The 64GB card is priced at $399.99.