There are many fake capacity USB flash drives on the market that claim a particular capacity, but only delivery somewhat less than this (particularly the larger drives). This is sometimes refered to as fake 'oversize capacity'. The counterfeit drives we have examined appear to have the stated capacity in Windows Properties and it is not until you test the drive with BurnInTest that you see that there is significantly less real space.....
[Read the entire article about detecting fake USB drives]
[Read the entire article about detecting fake USB drives]