Some links here are affiliate links. If you buy through them we may earn a small commission at no extra cost to you. As an Amazon Associate we earn from qualifying purchases.
The SD card mistake that ruins your video

Your camera keeps stopping mid recording, and the card is usually why. Most people buy on capacity alone.
A big card can still be slow, and video needs steady write speed, not just space. Check the V rating on the card, V30 or higher for four K video, and make sure your camera supports it.
Buy from a proper seller, because fake cards are common online. And format the card in the camera, not on your computer.
Do that, keep a spare card in your bag, and you avoid dropped frames, corrupted clips and lost footage. Cheap cards cost little, but a lost shoot costs a lot.
Spec for spec, speed rating beats size.
The picks
FREE · NO SIGN-UP
Buying used? Grab the checklist first
The 12 checks Lewis runs before handing over cash for a second-hand camera or lens. Print it or keep it on your phone.
Get the free used-gear checklist →Download the printable PDF (free) →▶ Subscribe: 2 budget tips a dayLewis's Lightroom presets →Read next
The SD card mistake that ruins your videoHere's a mistake that ruins good footage: using any old SD card for video. Cheap, slow cards…Read the guide →
The 3-second test that spots a dodgy used lensBuying a used lens? Shine your phone torch through it. Spidery threads mean fungus. Walk away.…Read the guide →
Don't buy a new camera. Buy this insteadDon't buy a new camera. Used ones lose most of their value early, then hold it. Buy from a…Read the guide →