H2testw is a free tool developed by Harald Boegeholz which can check your mass media devices for its actual size, as opposed to the advertised side.
The invention of this tool came about because of the sale of counterfeit SD cards and USB sticks which were not the actual claimed size.
With H2testw, you can write and read how much data the storage device is actually capable of holding. This can work with network drives, hard drives, SD cards and USB sticks.
This download is licensed as freeware for the Windows (32-bit and 64-bit) operating system on a laptop or desktop PC from computer utilities without restrictions. H2testw 1.4 is available to all software users as a free download for Windows 10 PCs but also without a hitch on Windows 7 and Windows 8.
Compatibility with this USB scanner software may vary, but will generally run fine under Microsoft Windows 10, Windows 8, Windows 8.1, Windows 7, Windows Vista and Windows XP on either a 32-bit or 64-bit setup. A separate x64 version may be available from Harald Boegeholz.
We have tested H2testw 1.4 against malware with several different programs. We certify that this program is clean of viruses, malware and trojans.