The 64 GB microSDXC Memory Card with a full-size SanDisk memory card adapter is for use with our hidden DVR line.

Micro SD Class 4

It’s all about size when it comes to the micro secure digital (SD) memory card. Micro cards are physically much smaller than standard SD cards while providing fast write speed and digital storage required by today’s electronic devices.

Micro SD cards are mostly used in smaller electronic devices because of their tiny size. They can be used in devices accepting standard size SD cards by placing them in an adapter that fits into a standard SD card slot. Placing micro SD cards in an adapter is common for use with tablets and other computers.

The tiny size of micro SD cards matches the slim features of most cellular or smartphones. Many of these devices only accept memory cards with a certain maximum storage capacity. This storage limitation is mirrored by micro SD cards which generally fall into the 8 GB, 16 GB, and 32 GB sizes. Larger storage size is available, but first, check compatibility with your device before use.

Like the larger SD cards, micro SD Class 4 memory cards have a write speed of 4 MB per second. This write speed is generally acceptable for most personal photos, video recordings, or other data storage from a smartphone. By comparison, the write speed for micro SD Class 10 memory cards is 10 MB per second. The difference in speed likely won’t be noticed by the average user snapping selfies. Video recordings may show a “lag” when replayed if the memory card writes speed doesn’t match the quality of the video. A Class 4 memory card may be slower than expected when replaying an HD video.