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- Storage Capacity
The capacity of USB flash drives varies, covering multiple specifications from smaller to larger capacities to meet the storage needs of different users. Currently, the common capacities of USB flash drives include 16GB, 32GB, 64GB, 128GB, 256GB, 512GB, and even 1TB, 2TB, etc.
Kapazität
Small Capacity
1GB，2GB，4GB，8GB，16GB
Middle Capacity
Large Capacity
1TB
2TB
- Actual Available Capacity Calculation Table
Difference between nominal capacity and actual capacity:
Since the nominal capacity of storage devices is usually calculated according to 1GB=1000MB, 1MB=1000KB, 1KB=1000B, while the computer system recognizes the storage capacity according to 1GB=1024MB, 1MB=1024KB, 1KB=1024B, the actual usable capacity of USB flash drives is slightly smaller than the nominal capacity. Therefore, the actual usable capacity of USB flash disk will be slightly smaller than the nominal capacity. Generally speaking, the actual usable capacity of a USB flash drive with a nominal capacity of 16GB is around 14.5GB to 15GB.
System Occupancy and Hidden Partition:
Some USB flash drives have built-in system files or hidden partitions for storing device drivers, encryption software, etc., which will further reduce the actual usable capacity. For example, some encrypted USB flash drives may take up hundreds of MB or even more than 1GB of space for their encryption software.
| Nominal capacity | The approximate value of the actual available capacity (calculated according to 1GB = 1000MB, 1MB = 1000KB, 1KB = 1000B and then converted into the capacity recognized by the computer) |
|---|---|
| 1GB | 1000MB / 1024 ≈ 0.9766GB |
| 2GB | 2000MB / 1024 ≈ 1.9531GB |
| 4GB | 4000MB / 1024 ≈ 3.9063GB |
| 8GB | 8000MB / 1024 ≈ 7.8125GB |
| 16GB | 16000MB / 1024 / 1024 / 1024 ≈ 14.90GB125 |
| 32GB | 32000MB / 1024 / 1024 / 1024 ≈ 29.80GB17 |
| 64GB | 64000MB / 1024 / 1024 / 1024 ≈ 59.60GB17 |
| 128GB | 128000MB / 1024 / 1024 / 1024 ≈ 119.21GB17 |
| 256GB | 256000MB / 1024 / 1024 / 1024 ≈ 238.42GB |
| 512GB | 512000MB / 1024 / 1024 / 1024 ≈ 476.84GB |
| 1TB | 1000000MB / 1024 / 1024 / 1024 ≈ 0.9095TB |
| 2TB | 2000000MB / 1024 / 1024 / 1024 ≈ 1.819TB |
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