For motion-activated cameras in low-traffic zones, you can stretch that to more hours on the same card size. Camera compatibility also matters. Many older or cheaper models max out at 64 GB.

A decade ago, for example, an 8GB memory card would have cost about $100. Today, you can buy a 128GB card—with 16 times the capacity—for about the same price.

Best SD card for a GoPro Hero: For Hero 4 Black and older, a Class 10-rated card is generally fine but newer cameras such as the Hero 7 Black should be fed with U3 or V30-rated cards.

Memory cards are all over the map -- a wide range of formats, sizes, and speeds. Some cards throw a bunch of numbers at you, while others may only list their capacity. Confusing doesn't begin to ...

An SDXC card, the newest type, can store as much as 2 terabytes of memory, although there are none yet on the market with that much storage. Since it has the largest capacity, this is also a good ...

Last week, SanDisk, which produces memory cards for cameras, camcorders, smartphones, and other mobile devices for storing images and video, announced that one of its latest microSD SDXC memory ...

In either case, you’ll want to invest in a good card with lots of room for your pictures. Prices for SDHC memory cards—the most popular type of camera media—can range from $5 to $95.

A memory card’s capacity is determined by the file system being used to store data designated by the type of card. SD (secure digital) cards are the oldest, least used and limited to 2GB of storage.

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.

You're probably wasting money on SD cards. As a camera reviewer, I have plenty of reasons to buy pricey cards, but for most shutterbugs and family historians, it's not necessary.

If you don’t have a Mac that comes with an SD Card slot, it’s an easy matter to add one. You can get straightforward USB Type-A adapters for as little as $7 with UHS-I throughput support.