Free answer for DJI drone pilots
How much storage does 4K drone video use per minute?
Multiply the bitrate in megabits per second by 60 for a minute, then divide by 8 to turn bits into bytes. Example: the DJI Mini 4 Pro spec page gives a maximum video bitrate of 150 Mbps; 150 × 60 = 9,000 megabits, ÷ 8 = 1,125 MB, so about 1.1 GB per minute at that maximum and 67.5 GB per hour. Use the maximum bitrate for planning: a clip recorded below it is smaller, never bigger.
Last updated 2026-11-11.
The formula
MB per minute = Mbps × 60 ÷ 8. GB per hour = MB per minute × 60 ÷ 1,000. Card makers count 1 GB as 1,000 MB, so this page does the same; your computer may show the same file in GiB, which reads about 7% smaller.
Megabits (Mb, small b) are what bitrates use; megabytes (MB, capital B) are what file sizes use. One byte is 8 bits, which is the whole reason for the ÷ 8.
Table by bitrate
100 Mbps: 750 MB a minute, 45 GB an hour. 130 Mbps: 975 MB a minute, 58.5 GB an hour. 150 Mbps: 1,125 MB a minute, 67.5 GB an hour. 200 Mbps: 1,500 MB a minute, 90 GB an hour.
A 20-minute flight recorded the whole time at 150 Mbps is 20 × 1,125 = 22,500 MB, about 22.5 GB.
What changes the size and what does not
Only the bitrate and the recording time enter the arithmetic. Resolution, frame rate, codec and color profile matter only through the bitrate the drone actually writes; the spec page gives the maximum, so the table is an upper bound per minute.
On the Mini 4 Pro, DJI lists the 150 Mbps maximum for both H.264 and H.265, so switching codec does not raise the planning figure.
Where these numbers come from
The 150 Mbps figure is from DJI's Mini 4 Pro spec page (read 2026-11-11). The other bitrates in the table are round example values, not claims about a particular drone; read your drone's spec page for its own maximum and put it into the formula.
Sources
Read on 2026-11-11. These pages change; if a line here no longer matches, the linked page wins.
Questions
How many GB is 10 minutes of 4K at 150 Mbps?
150 × 60 ÷ 8 = 1,125 MB a minute, × 10 = 11,250 MB, about 11.3 GB.
Is H.265 smaller than H.264 on the Mini 4 Pro?
Not in the planning figure: DJI's spec page gives the same 150 Mbps maximum for both, so plan with the same size.
Why does my computer show a smaller number?
It may count in GiB (1,073.7 MB each) instead of GB (1,000 MB), so the same file reads about 7% smaller.
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