A USB contains a flash chip that stores data, and is available in sizes 8, 16, 32, 64 and so on. The flash memory controller of the USB drive formats the memory chip and transfers data between digital devices.Ī fake flash USB drive misprograms the controller to indicate a bigger chip than what is actually installed. So, it is possible to put in a 16GB chip and have the controller report its capacity as 64GB or more. Once the 16GB space gets filled, the controller activates an internal component to write data in the same location. As the data keeps getting overwritten, you keep losing your precious files and photos. The only way to check the real drive size is to test the USB drive before using it. There are multiple online tools that help you figure out whether you've bought a fake flash USB drive. H2Testw is a free tool to verify the correct capacity of USB flash drives. It does not require installation (you can download it and delete after use), and is easy to use. Wait for the tool to scan the capacity of the flash drive.'Select Target' and choose your USB flash drive.Connect the flash drive to your computer.In fact, most resellers use this tool to ensure that the inventory they have purchased is authentic before they list memory cards or flash USB drives on the internet to sell. The test can take several hours but the results are reliable.

This is a quick tool to test the capacity of USB flash drives.

But it is also a risky one as it will delete all the data on your drive as part of the test. So, make sure you've removed important files from the device before you run the test. FakeFlashTest also recommends repartitioning and formatting your USB flash drive after the test. In layman's terms, partitioning means dividing your flash drive into one or more partitions based on your personal requirements.

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