Trail camera SD card size calculator
SanDisk Ultra 32GB SDHC
$19.99 listed price, changes often See it on AmazonCards above 32GB are SDXC. Many older and budget trail cameras accept SDHC only (32GB maximum): check the manual before buying larger.
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What size SD card does a trail camera need?
For most photo-mode trail cameras checked monthly, 32GB is the right size. The calculator multiplies the file size of one trigger (photo size times burst, or video bitrate times clip length) by triggers per day and days between checks, adds 25% headroom, and rounds up to a standard card. At 30 triggers a day of 20MP photos, a month uses under 4GB, so even a 16GB card works. Video changes everything: 10-second 1080p clips at the same pace use about 18GB a month.
Does a higher megapixel setting need a bigger card?
Yes, and it usually buys you nothing. Most trail cameras advertise 30 to 64MP but use a 5 to 20MP sensor and upscale the image in software. The file gets two to three times larger while the detail stays the same. Setting the camera to its native resolution (the manual usually lists it) is the single easiest way to stretch a card.
| Setting | MB per photo | Photos on 32GB |
|---|---|---|
| 12MP | 2.4 | 12,400 |
| 20MP | 4.2 | 7,080 |
| 32MP | 6.6 | 4,500 |
| 64MP | 12.5 | 2,380 |
SDHC or SDXC: will a bigger card work?
Cards of 32GB and under are SDHC; 64GB and up are SDXC and use a different file system (exFAT). Many older and budget trail cameras only read SDHC, so a 128GB card simply will not format. Check the manual for the maximum supported size before buying big. For most cameras a pair of SanDisk Ultra 32GB cards, swapped at each check, is the practical answer: you never lose a month of photos to one failed card.
How do I view the card in the field?
A phone card reader such as the Cabor USB-C trail camera viewer lets you check photos at the tree and decide whether to move the camera without carrying a laptop. Always format a card in the camera, not on a computer, before each deployment.
Card sizes by brand: SPYPOINT, Moultrie, Bushnell, Browning, Tactacam, Stealth Cam, GardePro, WOSPORTS and Wildgame Innovations.
Frequently asked questions
Is a 32GB SD card enough for a trail camera?
For photo mode, yes: at 30 triggers a day and a 20MP setting, 32GB holds nearly eight months. For video it depends on clip length and resolution. Ten-second 1080p clips at 30 triggers a day fill 32GB in about seven weeks, and 4K clips fill it in a little over two weeks.
What speed class SD card do trail cameras need?
Class 10 or UHS-I U1 is plenty for photos and 1080p video. 4K video cameras are safer with a U3 or V30 card, which guarantees a sustained 30MB per second write speed. Speed matters less than reliability: a name-brand card from a trusted seller avoids the counterfeit cards that fail in the cold.
Why does my trail camera say the SD card is full or has an error?
The most common causes are a card larger than the camera supports, a card formatted on a computer instead of in the camera, a locked write-protect switch, or a counterfeit card. Format the card in the camera, confirm the maximum size in the manual, and replace any card that keeps erroring.
Researched from published specifications, brand plan lists and verified owner reviews; we do not claim hands-on testing. General information, not professional, legal or security advice. Trail camera rules differ by state: some restrict transmitting cameras during hunting seasons or on public land, so check your state wildlife agency. Recording and audio laws vary; only record where you have the right to.