The short answer
Estimate photos from count multiplied by average file size. Estimate video from total bitrate multiplied by duration. Resolution labels such as 4K do not determine a single file size because encoding settings and content vary.
Sample your own photo collection
Select representative files, including formats you actually retain. Ten thousand photos at an assumed 5 MB each occupy 50 decimal GB before a buffer or backup. RAW originals and edited exports should be counted separately when you keep both.
Use video bitrate rather than a fixed resolution claim
Three hour-long recordings at an assumed total 20 Mbps occupy about 27 GB: 20,000,000 bits per second multiplied by 10,800 seconds, divided by eight. Add audio to video bitrate if it is not already included. Variable bitrate can change the result.
Separate working media and recovery copies
Plan space for source footage, edited projects and delivery copies. Decide which assets remain online and which belong in an archive. A calculator can estimate capacity; it does not promise playback, editing, compression or media-conversion features in One Cloud Disk.
Checklist
- 1Measure representative photo files.
- 2Record total video bitrate and duration.
- 3Count originals and exports separately.
- 4Add a deliberate buffer and recovery plan.
Good questions. Clear answers.
Is every 4K video the same size?
No. Duration, codec, total bitrate and content affect size.
How many 5 MB photos fit in 1 TB?
About 200,000 in decimal units before overhead, retained versions or extra copies.
Related free tools
Plan storage for a photo collection using image count, average file size and extra space.
Video storage calculatorEstimate video file sizes from bitrate, duration and the number of recordings.
Backup storage calculatorEstimate full copies plus retained daily changed data before planning backup capacity.