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A 64GB SD card can record anywhere from about 10 minutes to several hours of video, depending on the camera’s recording mode and bitrate. In Sony’s FX30 examples, listed modes range from 10 minutes at 600 Mbps to 3 hours at 25 Mbps. Resolution labels such as “4K” or “1080p” alone do not tell you how long a card will last.
How long will a 64GB SD card record?
Use the camera maker’s estimate for your exact model and selected mode. Official examples illustrate how widely times vary: Sony lists different durations for different modes on both the FX30 and ZV-E10, while Canon’s EOS C70 tables vary by format and bitrate. These are model-specific manufacturer estimates, not universal runtimes.
| Camera and mode example | Manufacturer estimate for a 64GB card |
|---|---|
| Sony FX30, listed modes | 10 minutes at 600 Mbps; 3 hours at 25 Mbps. Sony FX30 Help Guide |
| Sony ZV-E10, 4K | 1 hour 15 minutes at 100 Mbps; 2 hours at 60 Mbps. Sony ZV-E10 Help Guide |
| Sony ZV-E10, HD | 2 hours 20 minutes at 50 Mbps; 4 hours 20 minutes at 25 Mbps. Sony ZV-E10 Help Guide |
| Fujifilm GFX100 II, two listed movie modes at default bitrate | 79 minutes for each listed mode. Fujifilm GFX100 II manual |
| Canon EOS C70, listed XF-AVC modes | 13 minutes at 600 Mbps to 472 minutes at 17 Mbps. Canon EOS C70 specifications |
| Canon EOS C70, listed H.265 MP4 modes | 35 minutes at 225 Mbps to 891 minutes at 9 Mbps. Canon EOS C70 specifications |
For another rough reference, SanDisk’s capacity table estimates 320 minutes at 24 Mbps, 480 at 17 Mbps, 640 at 13 Mbps, 880 at 9 Mbps, 960 at 8 Mbps, and 1,280 at 6 Mbps on a 64GB card. These are approximate manufacturer estimates, not guaranteed usable recording times; available space and actual file sizes vary. SanDisk’s video capacity estimates
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Bitrate is the key variable
Bitrate is the amount of data recorded each second. A higher bitrate uses card space faster, so recording time falls. A 600 Mbps mode can fill a card far sooner than a 25 Mbps mode, even on the same camera.
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Resolution is not enough to predict duration
Two cameras can both record “4K” while using different bitrates, codecs, frame rates, and compression settings. The ZV-E10 examples alone show two different 4K estimates, tied to 100 Mbps and 60 Mbps modes. Check the exact mode name and settings, not just the resolution.
Variable bitrate and scene complexity matter
Some cameras vary the data rate with the scene. Complex or fast-moving footage can use more space than simpler footage at the same nominal setting, reducing the time available. Sony notes this behavior in its FX30 and ZV-E10 guidance.
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- UHS Speed Class 3 (U3) and Video Speed Class 30 (V30) (UHS Speed Class 3 designates a performance option designed to support 4K UHD video recording with enabled UHS host devices. UHS Video Speed Class 30 (V30), sustained video capture rate of 30MB/s, designates a performance option designed to support real-time video recording with UHS enabled host devices. See the SD Association’s official website.)
Estimate recording time from bitrate
If your camera specifies bitrate, a rough calculation is:
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Recording time in seconds ≈ usable card capacity in megabits ÷ bitrate in megabits per second
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- Up to 64GB to store tons of pictures and even more Full HD video(2).
A nominal 64GB represents about 512 gigabits before formatting and other unavailable space, so the real result will be lower. This calculation is only an estimate: the camera’s format, compression, scene content, and available capacity affect actual duration. SanDisk also cautions that recording time varies with resolution, file size, compression, bitrate, content, device, and other factors.
For a practical answer, use the remaining-time display in the camera after selecting the intended recording mode, or consult the manufacturer’s recording-time table for that mode. Do not treat a generic bitrate calculation as a promise of runtime.
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Check SDXC compatibility and recording speed
A 64GB card belongs to the SDXC family. The SD Association defines SDXC as more than 32GB through 2TB and specifies exFAT. The camera must support SDXC and the card format; capacity alone does not establish compatibility. SD Association capacity definitions
Speed class is separate from capacity. The SD Association’s speed-class guidance describes minimum sequential performance under defined conditions and recommends matching or exceeding the host device’s requirement. V30 and U3 correspond to 30 MB/s minimum sequential write performance under that guidance, but neither label is a universal guarantee for every 4K mode. Check the camera manual’s approved-card list and required speed class for your chosen mode. SD Association speed classes SD Association video speed class
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- Confirm that the camera accepts 64GB SDXC cards.
- Check the required speed class for the specific resolution, frame rate, and bitrate.
- Use the camera maker’s approved-card guidance where available.
- Check remaining capacity and the camera’s recording-time estimate before an important session.
For example, Canon’s EOS C70 specifications list the Panasonic RP-SDZA64GAK (64GB, C10/U3/V90) among approved cards for that camera. This is a model-specific example, not a general recommendation for other cameras. Canon EOS C70 specifications
Quick Recap
What can stop a recording before the card is full?
- Storage runs out: available space is consumed at a rate determined by bitrate and footage.
- A camera session limit is reached: Sony documents an approximately 13-hour single-movie-session product limit for the FX30 and ZV-E10. This is distinct from how much footage fits on a card and does not establish a limit for other cameras. FX30 guidance ZV-E10 guidance
- Heat or operating conditions intervene: Sony warns that temperature, conditions, power state, and settings affect recording, and that the camera may stop if it gets too hot. Those cautions apply to the named Sony models; check your own camera’s documentation. FX30 guidance ZV-E10 guidance
- A clip is divided into multiple files: Canon says the EOS C70 divides files at 4GB when using FAT32, while its exFAT behavior has no such division unit. Fujifilm notes that long GFX100 II clips can span multiple files without interrupting recording. A file boundary does not necessarily mean the camera stopped; behavior depends on the model and file system. Canon EOS C70 specifications Fujifilm GFX100 II manual
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