Why actual capacity is lower than label marked?
The capacity won’t be less than about 93% of on label after formated, which USB Flash Drive products are good. For the capacity loss in normally, between Flash formatted and unformatted. Here’s example to a Hard Disk (same theory to NandFalsh): Hard disk original capacity 80GB the trade mark is showed 80GB on it. 80GB→ 80?000 = 80,000MB→ 80,000?000 = 80,000,000KB→ 80,000,000?000 = 80,000,000,000 bit. when the hard disk 80GB is formatted, it possesses 80,000,000,000 bit , original capacity is to be marked 80GB too, but it is switched in windows system: 80,000,000,000 bit→ 80,000,000,000?024 = 78,125,000KB→ 78,125,000?024 = 76,294MB→ 76,294?024 = 74.5GB This is cause the capacity is deducted ,it is from converted unit 1000 and 1024. Every flash memory products, include hard disk products have the same characters like this.
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