How Many Hours Of Video Can 128GB Hold?

Last Updated on May 1, 2023 by QCity Editorial Stuff

The amount of video that 128GB can hold depends on several factors such as the video resolution, bitrate, and compression format. A 128GB of storage can hold approximately 24 hours of video at 30 frames per second, 32 hours of video at 24 fps, and 48 hours of video at 15 fps.

Understanding video file size and formats

Video Formats

There are several video formats available, including AVI, MP4, MOV, WMV, and more. Each format has its own features and advantages. For example, MP4 is a popular format because it offers high video quality with smaller file sizes, making it suitable for web streaming and mobile devices. On the other hand, AVI has larger file sizes but offers higher quality, making it more suitable for professional video editing.

Factors Affecting Video File Size

Several factors can affect the size of a video file, including video resolution, frame rate, bit rate, codec, and compression format. Higher resolutions and frame rates will result in larger file sizes, as will higher bit rates, which determine the amount of data transferred per second. Additionally, the codec and compression format used can greatly impact file size.

Understanding Video File Size

To calculate the size of a video file, you can use the following formula:

  • Video file size (in bytes) = Total bitrate (in bits per second) x video duration (in seconds) / 8
  • For example, if a video has a total bitrate of 8 Mbps (8,000,000 bits per second) and is 10 minutes (or 600 seconds) long, the file size would be:
  • 8,000,000 x 600 / 8 = 600,000,000 bytes or approximately 571.4 MB

Keep in mind that the actual file size may vary depending on the codec and compression format used, as well as other factors such as audio and subtitle tracks.

How storage capacity is measured

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Storage capacity is measured in units of bytes, with each unit representing a different amount of storage space. The most commonly used storage units are:

  • Byte (B): the basic unit of digital storage, representing a single character or symbol.
  • Kilobyte (KB): 1,000 bytes, or approximately one thousand characters or symbols.
  • Megabyte (MB): 1,000 kilobytes, or approximately one million characters or symbols.
  • Gigabyte (GB): 1,000 megabytes, or approximately one billion characters or symbols.
  • Terabyte (TB): 1,000 gigabytes, or approximately one trillion characters or symbols.

How storage capacity is calculated

To calculate storage capacity, simply multiply the number of units (GB, MB, TB, etc.) by the size of the unit (in bytes). For example, a hard drive with a capacity of 1 terabyte would have a total storage capacity of:

1,000 GB x 1,000 MB/GB x 1,000 KB/MB x 1,000 B/KB = 1,000,000,000,000 bytes

This can also be expressed as 1 x 10^12 bytes or approximately 931.32 gibibytes (GiB), a unit of measurement often used in computer science and engineering.

When discussing storage capacity, it’s important to note that the actual usable space may be less than the advertised capacity due to formatting and file system overhead, as well as other factors such as bad sectors. Additionally, some operating systems and software may display storage capacity using different units or conventions (e.g. using binary prefixes instead of decimal ones).

How many videos can 128GB hold?

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The amount of video that 128GB can hold varies depending on the video format, quality, and length. Assuming an average bitrate of 8 Mbps (megabits per second), which is common for Full HD (1080p) video, 128GB of storage can hold approximately:

  • 24 hours of video at 30 frames per second (fps)
  • 32 hours of video at 24 fps
  • 48 hours of video at 15 fps

However, if the video resolution is higher, such as 4K (2160p), the file sizes will be larger, and therefore, the amount of video that 128GB can hold will be lower. Conversely, if the video resolution is lower, such as 720p or lower, the file sizes will be smaller, and therefore, the amount of video that 128GB can hold will be higher.

Here are some examples of video files and their corresponding sizes for a 1-minute clip:

  • 720p video at 30 fps with a bitrate of 5 Mbps: approximately 36 MB
  • 1080p video at 30 fps with a bitrate of 8 Mbps: approximately 60 MB
  • 4K video at 30 fps with a bitrate of 50 Mbps: approximately 375 MB

It’s important to note that these are just estimates, and actual file sizes may vary based on factors such as codec, compression format, and audio track. Additionally, the actual storage capacity of a 128GB device may be slightly less due to formatting and file system overhead.

Video compression and how it affects storage capacity

Video compression is the process of reducing the file size of a video by encoding it with a compression algorithm. This is done by removing redundant or unnecessary information from the video, while still maintaining as much visual quality as possible.

Video compression affects storage capacity by reducing the amount of storage space required to store a video file. Since compressed video files are smaller, more videos can be stored on a device with limited storage capacity, such as a hard drive, SD card, or mobile device.

There are two main types of video compression: lossless and lossy. Lossless compression preserves all of the original data and can be decompressed to the exact same file size and quality as the original, but it typically results in larger file sizes. Lossy compression, on the other hand, removes some of the original data, resulting in smaller file sizes, but also a slight loss in visual quality.

Tips for maximizing storage capacity for video storage

  • Choose the right video format: Different video formats have different levels of compression, which can greatly impact file size. For example, H.264 is a popular format that offers good compression while still maintaining visual quality.
  • Reduce video resolution: Lower-resolution videos take up less storage space than higher-resolution videos. If you don’t need the highest resolution possible, consider reducing the resolution to save storage space.
  • Reduce video length: Shorter videos take up less storage space than longer ones. Consider trimming unnecessary footage from videos to reduce their length and file size.
  • Use lossy compression: Lossy compression reduces file size by removing some of the original data, but still maintains acceptable levels of visual quality. Consider using lossy compression to reduce video file size without sacrificing too much quality.
  • Store videos in the cloud: Cloud storage can be a convenient way to store videos without taking up space on your local device. However, be aware that cloud storage may come with storage limits and/or additional costs.
  • Delete unnecessary videos: Regularly go through your video collection and delete any videos that you no longer need. This will free up storage space for new videos.
  • Use an external hard drive: If you have a large video collection, consider using an external hard drive to store your videos. This can provide additional storage space and can be easily transported.


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