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On an Osmo Pocket 3, a 128 GB microSD card holds about 2 h 06 min of video at the maximum bitrate DJI publishes (130 Mbps) [calc]. For a day of vlogging, 128 GB is enough; for a trip without a laptop, get 256 GB.
How is the math done?
A 130 Mbps video writes 130 megabits per second, which is 16.25 megabytes per second, about 975 MB per minute. A 128 GB card (128,000 MB), counting 96% as usable, holds 122,880 ÷ 975 = 126 minutes [calc]. The maximum bitrate is the worst case: a calm scene or a 1080p mode writes less.
| Camera (max published bitrate) | 64 GB | 128 GB | 256 GB |
|---|---|---|---|
| Osmo Pocket 3 (130 Mbps) | 1 h 03 min | 2 h 06 min | 4 h 12 min |
| Osmo Action 5 Pro and Action 6 (120 Mbps) | 1 h 08 min | 2 h 17 min | 4 h 33 min |
| Insta360 X5 (180 Mbps) | 46 min | 1 h 31 min | 3 h 02 min |
How we compare: criteria, sources and dates
[calc] Bitrates read on November 14, 2026 on the spec pages: Osmo Pocket 3 (130 Mbps), Osmo Action 5 Pro, Osmo Action 6, Insta360 X5. The Action 6 also has 64 GB built in (50 GB usable), the Action 5 Pro 64 GB (47 GB usable).
Which card size should you choose?
- 64 GB: about one hour on a Pocket 3, just for an outing.
- 128 GB: two hours, enough for a day of short takes; it is also roughly the Pocket 3's battery life (2 h 46 min stated).
- 256 GB: four hours, for a trip where you do not empty the card every night.
Do you need a fast card?
Yes, fast enough to write continuously at the camera's bitrate: 130 Mbps is about 16 MB per second, 180 Mbps about 23 MB per second. A card that is too slow stops the recording (the "SD card speed slow, shooting may stop" warning Pocket 3 owners search for). The brands publish recommended cards on their spec pages: that is the list to follow.
For battery life: Osmo Pocket 3 battery life. To choose the camera: Osmo Pocket 3 vs Insta360.
Frequently asked questions
How many minutes does a 128 GB card hold on the Osmo Pocket 3?
About 2 h 06 min at the maximum bitrate DJI publishes (130 Mbps), counting 96% of the card as usable [calc]. At a lower bitrate, in 1080p for example, the same card lasts longer.
What format should the SD card be for the Osmo Pocket 3?
DJI lists the exFAT file system on the Pocket 3 spec page. Cards over 32 GB come in exFAT; format the card in the camera before your first shoot.
What card speed do I need?
A card that writes continuously faster than the camera's bitrate: 130 Mbps is about 16 MB per second. DJI publishes a list of recommended cards on its spec page.