A “fake flash test” typically refers to a test that is used to determine if a flash drive or memory card is fake or counterfeit by checking flash drive capacity. Fake flash drives and memory cards are often sold online at prices that seem too good to be true, but they have much lower storage capacities than advertised and may fail or corrupt data when used.
A tool, which is actually called FakeFlashTest can be used to test for counterfeit flash drives. It works by testing flash drives and SD cards to report the actual storage size. Fake drives and cards have been programmed to lie about their size. This simple tool can verify that you got what you paid for. In addition FakeFlashTest can be used as a checkpoint to tell if an SD card or flash drive is starting to go bad before any data being stored on it is at risk of corruption or total loss.
The flash drive testing tool includes two types of tests. The first is a destructive quick size test which can detect if a USB flash drive is fake. Only perform this test if you have already backed up any important data stored on the drive. The second test can test empty space by writing to free space on the drive until it is full.
Though it is generally considered non-destructive, if a drive is fake, you might lose data, due to corruption. So it is still a good idea to backup any important data before proceeding.
Detecting a Fake USB Flash Drive – Fake Flash Test
File Size: 144 KB
Authors Website: Project Page
Download: Grab this Free Fake Flash Drive Tester – Fake Flash Test Download
If you found this tool useful, you might want to check out H2testw. This tool can also be used to check flash drive capacity. It writes a large amount of data to the flash drive or memory card and then reads it back to verify that the data was written correctly. If the test reveals that the actual storage capacity of the device is lower than advertised or that there are errors or inconsistencies in the data, then it may be a fake or counterfeit device.
Fake Flash Test - Detect a Fake Flash Drive ▷ Check Capacity

A "fake flash test" typically refers to a test that is used to determine if a flash drive or memory card is fake or counterfeit by checking flash drive capacity. Fake flash drives and memory cards are often sold online at prices that seem too good to be true, but they have much lower storage capacities than advertised and may fail or corrupt data when used.
Price Currency: USD
Operating System: Windows 7, 8, 10, 11
Application Category: Tool, Utility
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Pros
- Works well for both USB drives and SD cards.
Cons
- Can destroy data on the tested drive. make sure you do a backup first.